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Oracle || Date functions Part-1 by dinesh
 
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Oracle SQL Tutorial 33 - NUMBER Data Type
 
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This video we are going to discuss the NUMBER data type. The Number data type is used to store integers, and real numbers. When you create a column as a NUMBER, you can store pretty huge or pretty small numbers in this column. Now there are two things you need to consider when working with numbers, and that is the precision as well as the how big the number is. For example, we can store the number 9.9. This has two significant digits. We could also store the number 9.9 X 10^4. In this situation, the number is much larger, but the number of significant digits is the same. 9.9 are the significant digits. When we expand this out we just have 99000, and the zeros are just used for size and are not considered "significant" in this situation. In fact, you get a max precision of 38, but a maximum value of 9.99 * 10^125. You can also use this data type to store very small numbers. Check the docs for the specifics on maximums and minimums. You can provide it with two pieces of information: Precision - The total number of digits. Scale - The number of digits to the right of the decimal. You do it in this format: NUMBER (precision, scale). The important thing to remember in this is that when you specify a precision, you will be limiting the max size of the numbers. The secret behind this data type is that it is actually stored in scientific notation. That is we store a number and then we can multiply it by 10 raised to some power. This allows us to store much larger numbers without taking up a ton of space. The oracle docs actually gives a formula that you can use to see how much storage is going to be required for a specific NUMBER data type. How much precision can be used? The acceptable range is 1-38. What about scale? The range is actually -84 to 127. I'll explain the scale in more detail in an upcoming video. That's because there is a lot of confusing things here…What does it mean for the scale to be negative? How can we have a scale that is bigger that the total number of digits available through the precision. That's a topic for another video. It's important to understand that when we increase our scale, we decrease the max size of the number. For example if we have a precision of 5 and a scale of 3, the highest number we can store is 99.999. This is in contrast to a precision of 5 and a scale of 2 which allows for up to 99.999. Either way you get 5 significant digits, but the numbers of digits to the left and right of the decimal change. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 7616 Caleb Curry
Oracle - SQL - Date Functions
 
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Oracle - SQL - Date Functions Watch more Videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Anadi Sharma, Tutorials Point India Private Limited.
SQL Tutorial - SQL DATE Functions like GETDATE, DATEADD, CONVERT
 
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http://www.learningsqlserver2008.com/ https://youtu.be/KmsmPOImpHo - Date functions in SQL Server 2012 GETDATE -- Today's date DATEADD - adding time interval to an existing Date DATEPART - return part of the date like year or month DATEDIFF - Give you the different between two dates DAY - returns the day of the month MONTH - return the Month of the Year YEAR - returns the year in the Sql expression CAST - Converts an expression of one data type to another in SQL Server 2008 R2 CONVERT - Convert expressions of one data type to another in sql server r2 SQL Tutorial
Views: 58482 baghul
MySQL 33 - Datetime, Date, Time Data Types
 
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Next up on our MySQL to-do list is to learn about storing dates and times. There are various data types in MySQL for storing dates and times. It seems MySQL and databases likes to break everything up into multiple data types to make things more organized at the consequence of being confusing and annoying. This video is going to be talking about the DATETIME, DATE, and TIME data types. These are all used to store, you guessed it, dates and times. The one you choose depends on your needs. If you just need dates, choose DATE. If you just need times, choose TIME, if you need both stored together, choose DATETIME. Now you set a column one of these data types whenever you want every row for this field to have some sort of date, time or both…but how exactly is the data formatted? This requires us to understand some convention. For example, in the USA at least, if you have something like 4:30AM, by convention you know the hour is 4 and the minutes are 30. But this is just an agreed upon convention. MySQL has its own convention…For example 2017-02-02. The first thing is the year, the second is the month, and the third is the day. That is for the DATE. The convention for time is 22:54:30. The first is the hour (military time), the second is the minute, and the third is the seconds. Lastly, there can actually be fractions of seconds…up to microseconds! .123456. To use fractional seconds though you must specify to MySQL the precision of the TIME or DATETIME when you create it, for example DATETIME(6) would allow microsecond precision. How do you actually give a date to MySQL? By that I mean let's say you have a table with a column of DATETIME(6), and you want to give a value for that column, how do you format it? It's quoted. For example: '2017-02-02 22:54:30.333333' MySQL interprets this as a DATETIME. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 32785 Caleb Curry
Check Last Modified DateTime for An Object (Table,Stored Procedure,Trigger etc.) in SQL Server
 
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We as SQL Server developers send our DDL Scripts ( Add New Column, Drop some column from table, or Alter Stored Procedure) to DBA. After deployment we verify those changes and sometime it happens that the changes are not done. Maybe DBA has missed one of the script to run. If we can get the last modified date for object ( Table,Stored Procedure, View etc) that can confirm the changes are done on given date. blog post link for scripts used in this video http://sqlage.blogspot.com/2014/01/tsql-how-to-check-when-object-table.html
Views: 7402 TechBrothersIT
Oracle SQL: Exploring Date Functions
 
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http://www.informit.com/store/oracle-sql-livelessons-video-training-downloadable-9780134275741?WT.mc_id=Social_YT Oracle SQL: Exploring Date Functions is an excerpt from Oracle SQL LiveLessons Video Training -- 6+ Hours of Video -- Oracle SQL LiveLessons Video Training covers the basics of the Oracle SQL programming language. This course covers both Oracle standard SQL and the ANSI approved SQL that Oracle supports. The focus of the course is to give students working knowledge of the Oracle SQL language and at the conclusion of this course, students should be able to query the Oracle database. Description In this LiveLessons video course, Oracle ACE Director Dan Hotka will teach you how to use the SQL query language, interpret business questions into SQL code, and how to use Where clauses sub-queries, complex table join conditions, and how to create table objects and populate tables with data. Students will also learn how to access Oracle from Microsoft products such as Excel. In addition, they will learn how analytical SQL can be used for business analysis. This course will use both Toad and SQL Developer for SQL examples. About the Instructor Dan Hotka is a training specialist and an Oracle ACE director who has more than 37 years in the computer industry and more than 31 years of experience with Oracle products. His experience with the Oracle RDBMS dates back to the Oracle V4.0 days. Dan enjoys sharing his knowledge of the Oracle RDBMS. Dan is well published with 12 Oracle books and well over 200 published articles. He is also the video author for Oracle SQL Performance Tuning for Developers LiveLessons and Oracle PL/SQL Programming Fundamentals. He is frequently published in Oracle trade journals, regularly blogs, and speaks at Oracle conferences and user groups around the world. Visit his website at www.DanHotka.com. Skill Level Beginner Learn How To Use the SQL query language Interpret business questions into SQL code Understand Oracle standard SQL and ANSI SQL Work with Where clauses, sub-queries, and complex table join conditions Create table objects and populate these tables with data Access Oracle from Microsoft products such as Excel Use analytical SQL, useful for business analysts Who Should Take This Course Students who are new to SQL and want to learn Oracle SQL Course Requirements Basic knowledge of what is a database, especially RDBMS and what is a computer programming language http://www.informit.com/store/oracle-sql-livelessons-video-training-downloadable-9780134275741?WT.mc_id=Social_YT
Views: 4880 LiveLessons
Oracle TO_DATE Function Explained with Examples
 
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https://www.databasestar.com/oracle-to_date/ The Oracle TO_DATE function is one of the most useful conversion functions in Oracle. It can be a little confusing though. The TO_DATE function is used to convert a character value to a date value. You can use it to convert a string that is in the format of a date, into a date data type. Why would you use this? Converting a character to a date is helpful if you want to insert a date into a column in a table. Being specific about the format (explicit) is better than assuming the conversion will be done for you (implicit). This TO_DATE function only converts to a DATE data type. If you want to convert to the other datetime data types, you’ll have to use other functions such as TO_TIMESTAMP or TO_TIMESTAMP_TZ. The syntax for this function is: TO_DATE(charvalue [, format_mask [, nls_date_language]]) The parameters for this function are: Charvalue: This is the character value that you want to convert to a date. It’s the main input of the function. Format_mask: This is the format that the input value, the charvalue, is in. This is used to help convert your character value into a date, as your character may be in a different format to the default. Nls_date_language: this is used to determine how the output is displayed. For more information about the Oracle TO_DATE function, including all of the SQL shown in this video and the examples, read the related article here: https://www.databasestar.com/oracle-to_date/
Views: 1191 Database Star
How To Using Date Fomat In SQL Server
 
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This video for the SQL Programmer beginner only it will show you how to using date format in SQL Server
Views: 11863 Sourn Sarim
Dates, Times and Intervals in Oracle - The INTERVAL Datatype
 
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This video clip, on the INTERVAL Data Type, is taken from my www.pluralsight.com course "Introduction to Dates, Times and Intervals in Oracle". Click here to learn more about this course: http://www.pluralsight.com/courses/intro-dates-times-intervals-oracle?utm_source=youtube&utm_medium=video&utm_campaign=authordemo.
Views: 1453 sheepsqueezersYT
12. DATE, DATATIME and TIMESTAMP Data Type in SQL (Hindi)
 
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Please Subscribe Channel Like, Share and Comment Visit : www.geekyshows.com
Views: 28181 Geeky Shows
Oracle MONTHS_BETWEEN Function
 
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https://www.databasestar.com/oracle-months_between/ The Oracle MONTHS_BETWEEN function allows you to find the number of months between two dates. You can enter two dates and the function returns the difference. This function is often used as part of other calculations. Sometimes you’ll want to know the difference between two dates to perform other functions. The syntax of the MONTHS_BETWEEN function is: MONTHS_BETWEEN(date1, date2) What do these two parameters mean? The function performs date1 minus date2. So, if date1 is larger, the result is positive. If date2 is larger, then the result is negative. What data type is returned? It depends on the values you provide. If the dates are both on the same day of the month (e.g. both on the 10th of the month), then the result is an integer or whole number. If not, then the result will be a decimal value. For more information on the MONTHS_BETWEEN function, including the code used in this video and examples, read the related article here: https://www.databasestar.com/oracle-months_between/
Views: 896 Database Star
37. Conversion Functions To Char, To Date, NVL, Decode in PL/SQL Oracle
 
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In this video you will learn about Conversion Functions To Char, To Date, NVL, Decode in PL/SQL Oracle. For Support =========== Email: [email protected] Contact Form: http://www.learninhindi.com/home/contact Our Social Media ================ Facebook: https://www.facebook.com/LearnInHindi Twitter: https://twitter.com/LearnInHindi For Training & Videos ===================== For more videos and articles visit: http://www.learninhindi.com Free Java Programming In Hindi Course ===================================== https://www.youtube.com/playlist?list=PLOZ3jentlCDAwwhMyoLISrxkXTADGp7PH Free Oracle PL/SQL Programming In Hindi Course ============================================== https://www.youtube.com/playlist?list=PLB5DA82419C2D99B6 Free C Programming In Hindi Course ================================== https://www.youtube.com/playlist?list=PLOZ3jentlCDAxKpBLMWogxSdy6BZcsAJq Trips & Tricks Channel ====================== https://www.youtube.com/channel/UCGmLfkuCo-3lHHJXRJ9HUMw Programming in Hindi Channel ============================ https://www.youtube.com/channel/UCudElIDgwNrybeAvXIy1HZQ
Views: 9393 ITORIAN
SQL Tutorial - 47: Date & Time Functions (Part-3)
 
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In this tutorial we'll check four important date & time functions that allow us to create Unix Time stamps, obtain time differences, convert time values to seconds and view month names of date values.
Views: 17861 The Bad Tutorials
Oracle CURRENT_TIMESTAMP Function
 
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https://www.databasestar.com/oracle-date-functions/ The Oracle CURRENT_TIMESTAMP function will display the current date and time in the session time zone. Just like the CURRENT_DATE function, it uses the session time zone, which is where you logged in from. This could be different to the database time zone. The syntax of the CURRENT_TIMESTAMP function is: CURRENT_TIMESTAMP ( [precision] ) The return type of this function is TIMESTAMP WITH TIME ZONE. The precision parameter is optional, and it lets you specify the number of fractional seconds to return. If this is omitted, it uses the default of 6. It’s different to the SYSTIMESTAMP function, because CURRENT_TIMESTAMP returns the session timezone, and SYSTIMESTAMP returns the database time zone. So, if I’m logging in from Melbourne, Australia, and the database is in London, England, then the CURRENT_TIMESTAMP will return a date and time that’s 10 hours ahead of SYSTIMESTAMP, and in a different time zone. It may be on the same day, or it could be a different day, depending on when I run the function. You can perform arithmetic on this function just like any other date value (e.g. CURRENT_TIMESTAMP - 7 for 7 days ago). However, it might be better to use interval data types so you can keep the original data type. For more information about the Oracle CURRENT_TIMESTAMP function, including all of the SQL shown in this video and the examples, read the related article here: https://www.databasestar.com/oracle-date-functions/
Views: 218 Database Star
Working with dates in Oracle PLSQL.
 
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Dates in Oracle PL SQL is definitely the most powerful among all other databases. It gives us full flexibility to manipulate it of our choice, whether you are calculating days, months or year, printing date and time in various format. Useful date functions add_months, months_between, last_day, next_day and to_char helps us a lot in handling date time in our pl sql programming.
Views: 5419 Subhroneel Ganguly
Oracle TO_TIMESTAMP Function
 
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https://www.databasestar.com/oracle-to_timestamp/ The Oracle TO_TIMESTAMP function can be confusing, but we’ll explain it in this video. This function allows you to convert a string value into a TIMESTAMP value. A TIMESTAMP value is a type of DATE, but has a few components: - A date, including day, month, and year - A time, including hours, minutes, seconds, and fractional seconds This is a useful data type because it allows you to store a time down to fractions of a second. The syntax of the TO_TIMESTAMP function is: TO_TIMESTAMP ( input_string [, format_mask] [, nls_param] ) The input_string parameter is the string you want to convert. The format_mask is where you specify the format of the input_string parameter. This is so you can specify the input_string in a variety of formats, and just use this format_mask to indicate which format it is in. The nls_param parameter is another optional parameter, and allows you to specify the returning language of the month and day names. The default format will depend on the region you’re running your database in. In my example (using Oracle Express in Australia), the default format is ‘DD-MM-RRRR HH:MI:SS AM’. For more information on the Oracle TO_TIMESTAMP function, including the SQL used in this video, read the related article here: https://www.databasestar.com/oracle-to_timestamp/
Views: 382 Database Star
TO_CHAR(datetime) Function in SQL Query
 
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TO_CHAR (datetime) : TO_CHAR (datetime) converts a datetime datatype to a value of VARCHAR2 datatype in the format specified by the date format. The following is a list of valid parameters when the TO_CHAR function is used to convert a date to a string. These parameters can be used in many combinations. YEAR Year, spelled out YYYY 4-digit year YYY Last 3 digits of year. YY Last 2 digits of year. Y Last 1 digit of year. IYYY 4-digit year based on the ISO standard Q Quarter of year (1, 2, 3, 4; JAN-MAR = 1). MM Month (01-12; JAN = 01). MON Abbreviated name of month. MONTH Name of month, padded with blanks to length of 9 characters. RM Roman numeral month (I-XII; JAN = I). WW Week of year (1-53) where week 1 starts on the first day of the year and continues to the seventh day of the year. W Week of month (1-5) where week 1 starts on the first day of the month and ends on the seventh. IW Week of year (1-52 or 1-53) based on the ISO standard. D Day of week (1-7). DAY Name of day. DD Day of month (1-31). DDD Day of year (1-366). DY Abbreviated name of day. J Julian day; the number of days since January 1, 4712 BC. HH Hour of day (1-12). HH12 Hour of day (1-12). HH24 Hour of day (0-23). MI Minute (0-59). SS Second (0-59). SSSSS Seconds past midnight (0-86399). FF Fractional seconds. Thanks for watching...:)
Views: 10219 WingsOfTechnology
SQL Date Comparison - How to filter Datetime in SQL Server - SQL Training Online
 
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http://www.sqltrainingonline.com SQL Date Comparison - How to filter Datetime in SQL Server - SQL Training Online In this video, I show you how to do a SQL Date Comparison in SQL Server when your Datetime has an actual time in it. I also include the latest trick that will make this easier if you are using SQL Server 2008 or SQL Server 2012. How do you compare a Datetime in SQL Server? A SQL Datetime stores both Date and Time. So when you are filtering using the SQL Where clause, you have to know if you Datetime is storing the time also. Let's take a look at the employee table in SQL Training Online Simple DB The column we are looking at is the hire date. I want to go after the person who was hired on February, 22 2005. So, I use the following SQL. select * from employee where hire_date='02/22/2005' Now, this works because we don't have any times stored in this column. But, if I change the record from 2005-02-22 00:00:00.000 to 2005-02-22 08:22:25.000 and rerun the query, you see that I don't get any results. That is because the value of 02/22/2005 is really 2005-02-22 00:00:00.000 and I just changed the hire_date to include a time other than 00:00:00.000. So, I have to tweak my query to use a greater than and less than sign. This works. But, to really understand what is going on, let me show you what SQL Server really sees. There are other ways, and in this StackOverflow article you can read more about these other ways. But, I want to point out a few. If you are working in SQL Server 2005 or earlier, the following is supposed to be the fastest performing way to do this. select datediff(dd,0, hire_date),* from employee where dateadd(dd,0, datediff(dd,0, hire_date)) = '2005-02-22' But, if you are working in SQL Server 2008 or SQL Server 2012, they have introduced an actual Date datatype that doesn't include the Time portion. Since this is the case, you can use the CAST function to remove the time from the Datetime. Here is the SQL to do that. select * from employee where CAST(hire_date AS Date) = '2005-02-22' And that's it. If you enjoy the video, please give it a like, comment, or subscribe to my channel. You can visit me at any of the following: SQL Training Online: http://www.sqltrainingonline.com Twitter: http://www.twitter.com/sql_by_joey Google+: https://plus.google.com/#100925239624117719658/posts LinkedIn: http://www.linkedin.com/in/joeyblue Facebook: http://www.facebook.com/sqltrainingonline
Views: 28460 Joey Blue
Oracle Date Format
 
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http://www.databasestar.com/oracle-to_date/ - A video that explains the different date formats in the Oracle SQL database.
Views: 3448 Database Star
Overview of SQL Server Data Types: Time Zone Aware Dates
 
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This video is part of LearnItFirst's Transact-SQL Programming: SQL Server 2008/R2 course. More information on this video and course is available here: http://www.learnitfirst.com/Course161 In the last video, you looked at a mixture of old and new temporal data types. In this video, Scott focuses on DATETIME2 and DATETIMEOFFSET. He will start by reviewing some date/time commands and introducing some new ones, and you will see some important things to keep in mind when using a DATETIMEOFFSET data type. What is the disadvantage of using the DATEADD function instead of the SWITCHOFFSET function? Highlights from this video: - What command returns the UTC date? - The SYSDATETIME function - What is the advantage of using DATETIME2? - How do you get a time zone aware version of DATETIME2? - Changing the time zone and much more...
Views: 5514 LearnItFirst.com
SQL tutorial 61: SEQUENCE in Oracle Database By Manish Sharma RebellionRider
 
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This tutorial is all about Sequence In Oracle Database. In this SQL Tutorial you will learn How to create a sequence How to populate a Primary key column (auto increment in Oracle) using Sequence How to drop a sequence ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/sql-sequence-in-oracle-database-rebellionrider-manish-sharma Previous Tutorial ► How To Insert Data into Table using SQL Developer http://youtu.be/YYQCSV6MzTk ► INSERT INTO Command http://youtu.be/uQXgqFtxI_k ► How to copy /Insert data into a table from another table http://youtu.be/m3Ep8tAMqok ------------------------------------------------------------------------- ►►►Help Me In Getting A Job◄◄◄ ►Help Me In Getting A Good Job By Connecting With Me on My LinkedIn and Endorsing My Skills. All My Contact Info is Down Below. You Can Also Refer Me To Your Company Thanks ------------------------------------------------------------------------- Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=kb4rc1 -------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! -------------------------------------------------------------------------- Amazon Wishlist: http://bit.ly/wishlist-amazon ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider https://www.facebook.com/imthebhardwaj http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ http://rebellionrider.tumblr.com/ http://www.pinterest.com/rebellionrider/ You can also Email me at for E-mail address please check About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 42563 Manish Sharma
Oracle SQL Tutorial 23 - Intro to Data Types
 
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Every column within a table has to be given what is known as a datatype. A data type is a fairly simple concept when you dissect the word. It is literally the type of data. Why do we use types, though? The biggest benefit is so that Oracle knows how to interpret and work with our data. It also makes the database better at rejecting incorrect data. If we had to concept of a data type, there would be a lot more work involved in forcing data to be of the right format. It would also be harder for us to get the database to treat the data in the correct way. In addition to this, a database can optimize storage and performance for a column if everything is of the same data type. Because of this, each column can only support one data type. There are numerous different data types in Oracle and it helps us if we categorize them. The first types of datatypes we should learn about are: String, Numeric, Temporal Now, there are few more categories we could make, but these are the main ones. We will worry about the other ones another day as I am only introducing the topic. A string data type is anything within quotes. Most databases use single quotes for string data. Inside of the quotes can be any number of characters. What is a character? Think of any letter, number, or symbol you can type. Some people call these letters, numbers, and symbols alphanumeric. Numeric data type includes only numbers. These data types are often used for data that you plan on using for mathematical calculations. Temporal data types are data types that are used for dates and times. Now, each data type is probably going to have some options you'll need to worry about, but one that comes up with every data type is storage. The reason we need to consider storage is because we may end up with millions of rows in a table and the difference between a few bytes for each row will make a huge difference when we look at the whole picture. When a data type gives you the option of size, you will want to a size that will be able to hold what you need, but nothing more. In the upcoming videos we are going to discuss the available data types in more detail. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 7258 Caleb Curry
Part 20   Using ROWVERSION or TIMESTAMP to detect concurrency conflicts
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/10/part-20-using-rowversion-or-timestamp.html This is continuation to Part 19. Please watch Part 19 before proceeding. In this video we will discuss how to use ROWVERSION or TIMESTAMP columns to detect concurrency conflicts in linq to sql. Let us understand this with an example. By default LINQ to SQL uses all the columns of the table in the WHERE clause to detect concurrency conflicts. The query would look as shown below. exec sp_executesql N'UPDATE [dbo].[Accounts] SET [AccountBalance] = @p3 WHERE ([AccountNumber] = @p0) AND ([AccountName] = @p1) AND ([AccountBalance] = @p2)', N'@p0 int,@p1 nvarchar(4000),@p2 int,@p3 int',@p0=1,@p1=N'John Mary',@p2=1000,@p3=1500 This is OK if we have a few columns in the table. In real time applications we may have tables with large number of columns. For example, what if the table has 30 columns. The WHERE clause would be huge and it can impact the performance of the application. In situations like this we can use ROWVERSION or TIMESTAMP columns. Here are the steps Step 1 : Add a Version column to the Accounts table. The datatype of the column must be either ROWVERSION or TIMESTAMP. The value for this column is automatically generated by the database if the row gets changed. So this column can alone be used to detect concurrency conflicts. ALTER TABLE Accounts ADD [Version] ROWVERSION Step 2 : In Visual Studio, delete the Account Entity from the Sample.dbml file Step 3 : In Server Explorer window in Visual Studio, right click on Accounts table and select "Refresh". Step 4 : Drag and drop Accounts table on the Designer surface of Sample.dbml file. Notice that a Version Property is automatically added. Navigate to Sample.Designer.cs file and look at the code generated for this property. Notice that IsVersion & IsDbGenerated properties are set to true. [global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_Version", AutoSync=AutoSync.Always, DbType="rowversion NOT NULL", CanBeNull=false, IsDbGenerated=true, IsVersion=true, UpdateCheck=UpdateCheck.Never)] public System.Data.Linq.Binary Version { get { return this._Version; } set { if ((this._Version != value)) { this.OnVersionChanging(value); this.SendPropertyChanging(); this._Version = value; this.SendPropertyChanged("Version"); this.OnVersionChanged(); } } } Testing for concurrency conflicts : Let's now simulate the scenario of 2 users updating the same record at the same time. To do this Step 1 : Throw a break point on the line where we call db.SubmitChanges(); in btnDeposit_Click() method. Step 2 : Run the application in Debug mode, and click "Deposit $500" button. The execution should stop on SubmitChanges() method. Step 3 : At this point open SQL Server Management Studio. a) Execute the following SELECT query Select * from Accounts where AccountNumber = 1 b) Notice the Value of Version column c) Execute the following UPDATE query Update Accounts set AccountBalance = AccountBalance - 300 Where AccountNumber = 1 d) Now notice that the Value of Version column is automatically changed to a new value Step 4 : Open SQL Profiler and run a new trace. Step 5 : Now come back to Visual Studio and press F5 to continue the execution. Notice that "ChangeConflictException" is thrown as expected. Step 6 : In SQL Profiler notice that the UPDATE query that is generated has used Version column in the WHERE clause to detect concurrency conflicts. exec sp_executesql N'UPDATE [dbo].[Accounts] SET [AccountBalance] = @p2 WHERE ([AccountNumber] = @p0) AND ([Version] = @p1) SELECT [t1].[Version] FROM [dbo].[Accounts] AS [t1] WHERE ((@@ROWCOUNT) ] 0) AND ([t1].[AccountNumber] = @p3)', N'@p0 int,@p1 timestamp,@p2 int,@p3 int',@p0=1,@p1=0x0000000000002715,@p2=1500,@p3=1
Views: 15901 kudvenkat
Oracle SQL Tutorial 24 - Important Data Types
 
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In the upcoming videos we are going to discuss data types in depth, but I don't want to drown you in all of the details. Because of that, I'm giving you this video which is going to introduce you to the most important data types. Then, in the upcoming videos, I'll describe them in more depth. One of the data types we've already discussed in this video is NUMBER. This data type is used to, obviously, store a number. It can be used to store integers (whole numbers), or numbers with decimals. There are two other numeric data types you should know of. BINARY_FLOAT and BINARY_DOUBLE are both numeric data types that are known as floating point numbers. A floating point number is often used for large numbers that have decimal places where it is acceptable to not be completely precise. What I mean by this is that these numbers can only store numbers correctly up to a certain decimal point. If you need perfect precision, you will want to use the NUMBER data type. Now storing numbers is good sometimes, but occasionally you will want to store string data. String data can be any sequence of characters, including numbers. By telling the database that a column is a string data type, the database knows how to treat that column. There are four important string data types that you need to know about. The first two are CHAR and NCHAR. These data types are used to store a fixed-length string. So for example, you can say you want to store 12 characters. This means that every value for this column will be exactly 12 characters. If you insert less than 12 characters, the data will be padded with spaces. This means you will want to use one of these data types when every value in the column is the same length. What is the difference between CHAR and NCHAR? CHAR uses what is known as ASCII while NCHAR uses Unicode. The difference is what characters are allowed and how much space each character takes. ASCII takes up less space but only supports English, numbers, and some symbols. UNICODE allows you to store characters from multiple languages but takes up more space. Those were both fixed-length string. What if you want to store data that changes in length? That is where VARCHAR2 and NVARCHAR2 come in. When it comes to storing dates, the data types that are most important are DATE and TIMESTAMP. Date can be used to store dates and time. Timestamp is a data type that can be used to store an exact moment in time. Lastly, there are interval types. These store a date range. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 6060 Caleb Curry
13 Oracle Database   Data Type Conversion Explicit and Implicit   To Number   To Char   To Date
 
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13-Oracle Database - Data Type Conversion Explicit and Implicit - To_Number - To_Char - To_Date.avi
Views: 3003 Adel Sabour
29. SQL Functions - Numeric
 
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ORACLE SQL NUMERIC FUNCTIONS This video shows oracle numeric functions for beginners. For Group / Aggregate Functions visit : https://youtu.be/tF_qnt_Nt7Y
Views: 81 ProSchool
SQL Cơ Bản - Bài 10: Tạo TABLE và CONSTRAINT, minh họa trên SQL Developer
 
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Tạo và quản lý table, Constraint. Các kiểu dữ lieu cơ bản: varchar2, char, number, date, timestamp,.. Phân biệt các các loại constraint trong Oracle.
Views: 5732 Database Tutorials
Date and Time Functions in SQL SERVER Part I || CURRENT_TIMESTAMP and DATEADD
 
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This video will provide you the details of each Date and Time Data Types and Function in SQL Server 2014. I'll be walking through each and every kinds of build in function which are available in SQL Server in my next videos. Date and Time Data Types and Functions :-  CURRENT_TIMESTAMP (Transact-SQL) Returns the current database system timestamp as a datetime value without the database time zone offset. This value is derived from the operating system of the computer on which the instance of SQL Server is running. This function is the ANSI SQL equivalent to GETDATE.  Syntax CURRENT_TIMESTAMP  Arguments Takes no arguments.  Return Type Datetime  Remarks Transact-SQL statements can refer to CURRENT_TIMESTAMP anywhere they can refer to a datetime expression.CURRENT_TIMESTAMP is a nondeterministic function. Views and expressions that reference this column cannot be indexed. *********************************************************************  DATEADD (Transact-SQL) Returns a specified date with the specified number interval (signed integer) added to a specified datepart of that date.  Syntax DATEADD (datepart , number , date )  Arguments datepart Is the part of date to which an integernumber is added. The following table lists all valid datepart arguments. User-defined variable equivalents are not valid. datepart Abbreviations year yy, yyyy quarter qq, q month mm, m dayofyear dy, y day dd, d week wk, ww weekday dw, w hour hh minute mi, n second ss, s millisecond ms microsecond mcs nanosecond ns number Is an expression that can be resolved to an int that is added to a datepart of date. User-defined variables are valid. If you specify a value with a decimal fraction, the fraction is truncated and not rounded. date Is an expression that can be resolved to a time, date, smalldatetime, datetime, datetime2, or datetimeoffset value. date can be an expression, column expression, user-defined variable, or string literal. If the expression is a string literal, it must resolve to a datetime. To avoid ambiguity, use four-digit years. For information about two-digit years,  Return Types The return data type is the data type of the date argument, except for string literals. The return data type for a string literal is datetime. An error will be raised if the string literal seconds scale is more than three positions (.nnn) or contains the time zone offset part.  Return Value  datepart Argument dayofyear, day, and weekday return the same value. Each datepart and its abbreviations return the same value. If datepart is month and the date month has more days than the return month and the date day does not exist in the return month, the last day of the return month is returned. For example, September has 30 days; therefore, the two following statements return 2006-09-30 00:00:00.000: SELECT DATEADD(month, 1, '2006-08-30'); SELECT DATEADD(month, 1, '2006-08-31');  number Argument The number argument cannot exceed the range of int. In the following statements, the argument for number exceeds the range of int by 1. The following error message is returned: "Msg 8115, Level 16, State 2, Line 1. Arithmetic overflow error converting expression to data type int." SELECT DATEADD(year,2147483648, '2006-07-31'); SELECT DATEADD(year,-2147483649, '2006-07-31');  date Argument The date argument cannot be incremented to a value outside the range of its data type. In the following statements, the number value that is added to the date value exceeds the range of the date data type. The following error message is returned: "Msg 517, Level 16, State 1, Line 1 Adding a value to a 'datetime' column caused overflow." SELECT DATEADD(year,2147483647, '2006-07-31'); SELECT DATEADD(year,-2147483647, '2006-07-31');  Return Values for a smalldatetime date and a second or Fractional Seconds datepart The seconds part of a smalldatetime value is always 00. If date is smalldatetime, the following apply: • If datepart is second and number is between -30 and +29, no addition is performed. • If datepart is second and number is less than-30 or more than +29, addition is performed beginning at one minute. • If datepart is millisecond and number is between -30001 and +29998, no addition is performed. • If datepart is millisecond and number is less than -30001 or more than +29998, addition is performed beginning at one minute.
Views: 286 Softtech forum
018-Oracle SQL 12c: Date functions
 
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تعلم اوراكل حتى الاحتراف تعلم اوراكل من الصفر
Views: 4280 khaled alkhudari
Session6 Data type in Oracle
 
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Session 6: Datatypes In Oracle   ALPHABET           : A-Z , a-z NUMBER              : 0-9 (with precision and scale) DATE / Temporal  : any Date and time (Hours, Minutes, Seconds, Mili-seconds, Timestamp, Timezone etc)   Alphabet + Number = Alphanumeric Data                                     = String / CHARACTER Datatype Category Number                    =  Numeric Datatype Category Date                         = Date Datatype Category 1. CHARACTER Datatype: CHAR, VARCHAR, NCHAR: CHAR is fixed length datatype and VARCHAR is Variable length datatype to store character data. i.e. A-Z , a-z , 0-9 , all keyboard characters etc. The default size is 1 character and it can store maximum up to 2000 bytes. Example : EName, EmpID, PassportNo, SSN, etc. EName CHAR(10) := ‘TOM’; wastage of 7 space after the string EName VARCHAR(10) := ‘TOM’; Spaces can be Reuse which left after the string NCHAR additionally handles NLS(National Language Support). Oracle supports a reliable Unicode datatype through NCHAR , NVARCHAR2 , and NCLOB  VARCHAR2, NVARCHAR2: These are Variable length datatype. VARCHAR2 handles alphanumeric character string whereas NVARCHAR2 handles alphanumeric character string with NLS(National Language Support). The default size is 1 character and it can store maximum up to 4000 bytes.   LONG:  Variable length string.  (Maximum size: 2 GB - 1) Only one LONG column is allowed per table. RAW:    Variable length binary string (Maximum size 2000 bytes) LONG RAW: Variable length binary string (Maximum size 2GB) 2. NUMERIC Datatype: NUMBER: It stores Numeric values and performs numeric calculations. NUMBER,   NUMBER(n),   NUMBER(p,s) It stores Numbers up to 38 digits of precision. SeqNo NUMBER;                     1, 123, 12345678 EmpID NUMBER(4);                 1, 123, 1234 Sal NUMBER(7,2);                     23456.78 , 123.45 — correction in video: Sal NUMBER(a7,2); which is wrong please ignore. 1234567 can be a type of NUMBER, NUMBER(7), NUMBER(7,0) It can store both integer and floating point numbers NUMERIC(p,s) FLOAT:   Ex:  EmpSal FLOAT;    FLOAT(7)       Decimal Points allowed DEC(p,s), DECIMAL(p,s) , REAL, DOUBLE PRECISION INTEGER:   Ex:  SSN INTEGER;       Decimal Points are not allowed INT, SMALLINT 3. DATE Datatype: DATE: It stores DATE(Date, Month, Year) and Time(Hour, Minute, Second, AM/PM) and performs calculations with such data. Default DATE format in Oracle is “DD-MON-YY” Based on "Gregorian calendar" where the date ranges from “JAN 1 4712 BC” to “DEC 31 9999 AD” doj DATE;    “18-MAR-2010 12:30:00 PM” TIMESTAMP:    It can store all parameters as DATE datatype and additionally it can have “Fraction of seconds” and TIMESTAMP WITH TIMEZONE / TIMESTAMP WITHOUT TIMEZONE. Range from 0-9 digits, the default size is 6. 4. LOB Datatype: LOB: “Large Object” data. It can store pictures, motion pictures, Textfiles etc. CLOB: “Character Large Object” is used to store structured information like a text file with a specific file format. BLOB: “Binary Large Object” is used to store Un-structured information like Image, JPEG files, MPEG files etc. BFILE: “Binary File” is used to store the pointer to a specific file / Just store the location of a file. Maximum size: (4 GB - 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB) Extra Information: NCLOB : It supports all the character set supported by CLOB and additionally it handles NLS(National Language Support ) Maximum size: (4 GB - 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB) ROWID and UROWID(optional size) Datatype: contains fixed length Binary data. BBBBBBB.RRRR.FFFFF combination of BLOCK-ROW-DATABASE FILE Physical and Logical ROWID Upcoming Session: Session 7: Populating Data into Tables(INSERT Statement): Inserting data into all columns of a table Inserting data into Required columns of a table Inserting NULL value into a table Inserting Special Values(USER / SYSDATE) into a table Supplying data at runtime(using & and &&) THANK YOU :)
Views: 106 Prabhat Sahu
Part 10 Date Function in Sql in Hindi
 
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SQL Server Date Functions The following table lists the most important built-in date functions in SQL Server: Function Description GETDATE() Returns the current date and time DATEPART() Returns a single part of a date/time DATEADD() Adds or subtracts a specified time interval from a date DATEDIFF() Returns the time between two dates CONVERT() Displays date/time data in different formats SQL Date Data Types SQL Server comes with the following data types for storing a date or a date/time value in the database: DATE - format YYYY-MM-DD DATETIME - format: YYYY-MM-DD HH:MI:SS SMALLDATETIME - format: YYYY-MM-DD HH:MI:SS TIMESTAMP - format: a unique number Note: The date types are chosen for a column when you create a new table in your database!
Views: 1154 Learn Everything
SQL Tutorial - 45: Date & Time Functions (Part-1)
 
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In this tutorial we'll see how we can add dates, subtract dates, view current date and current time using ADDDATE(), SUBDATE(), CURDATE() and CURTIME Functions respectively.
Views: 34760 The Bad Tutorials
38. Date Functions - Add_Months, Last_Day, Months_Between, Next_Day, To_Date, New_Time in Oracle
 
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In this video you will learn about Date Functions { Add_Months(), Last_Day(), Months_Between(), Next_Day(), To_Date(), New_Time() } in Oracle. Unlike other programming language Oracle also uses functions to perform common operations. For Support =========== Email: [email protected] Contact Form: http://www.learninhindi.com/home/contact Our Social Media ================ Facebook: https://www.facebook.com/LearnInHindi Twitter: https://twitter.com/LearnInHindi For Training & Videos ===================== For more videos and articles visit: http://www.learninhindi.com Free Java Programming In Hindi Course ===================================== https://www.youtube.com/playlist?list=PLOZ3jentlCDAwwhMyoLISrxkXTADGp7PH Free Oracle PL/SQL Programming In Hindi Course ============================================== https://www.youtube.com/playlist?list=PLB5DA82419C2D99B6 Free C Programming In Hindi Course ================================== https://www.youtube.com/playlist?list=PLOZ3jentlCDAxKpBLMWogxSdy6BZcsAJq Trips & Tricks Channel ====================== https://www.youtube.com/channel/UCGmLfkuCo-3lHHJXRJ9HUMw Programming in Hindi Channel ============================ https://www.youtube.com/channel/UCudElIDgwNrybeAvXIy1HZQ
Views: 19224 ITORIAN
SPOOL BY CURRENT DATE (SYSDATE) IN ORACLE
 
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SPOOL BY USING SYSDATE IN ORACLE
Views: 471 Rinku Kumar Singh
2 13 SYSDATE vs CURRENT DATE
 
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Oracle SQL SYSDATE vs CURRENT_DATE
Views: 392 Mahesh Peiris
SQL Tutorial - 12: Inserting Data Into Tables
 
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In this tutorial we'll learn to insert data into tables using the INSERT INTO statement.
Views: 166525 The Bad Tutorials
Learn Oracle | How to use the Character Functions, Date Functions in SQL
 
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Pebbles present, Learn Oracle 10g with Step By Step Video Tutorials. Learn Oracle 10g Tutorial series contains the following videos : Learn Oracle - History of Oracle Learn Oracle - What is Oracle - Why do we need Oracle Learn Oracle - What is a Database Learn Oracle - What is Grid Computing Learn Oracle - What is Normalization Learn Oracle - What is ORDBMS Learn Oracle - What is RDBMS Learn Oracle - Alias Names, Concatenation, Distinct Keyword Learn Oracle - Controlling and Managing User Access (Data Control Language) Learn Oracle - Introduction to SQL Learn Oracle - Oracle 10g New Data Types Learn Oracle - How to Alter a Table using SQL Learn Oracle - How to Create a Package in PL SQL Learn Oracle - How to Create a Report in SQL Plus Learn Oracle - How to Create a Table using SQL - Not Null, Unique Key, Primary Key Learn Oracle - How to Create a Table using SQL Learn Oracle - How to Create a Trigger in PL SQL Learn Oracle - How to Delete Data from a Table using SQL Learn Oracle - How to Drop and Truncate a Table using SQL Learn Oracle - How to Insert Data in a Table using SQL Learn Oracle - How to open ISQL Plus for the first time Learn Oracle - How to Open SQL Plus for the First Time Learn Oracle - How to Update a Table using SQL Learn Oracle - How to use Aggregate Functions in SQL Learn Oracle - How to use Functions in PL SQL Learn Oracle - How to use Group By, Having Clause in SQL Learn Oracle - How to Use Joins, Cross Join, Cartesian Product in SQL Learn Oracle - How to use Outer Joins (Left, Right, Full) in SQL Learn Oracle - How to use the Character Functions, Date Functions in SQL Learn Oracle - How to use the Merge Statement in SQL Learn Oracle - How to use the ORDER BY Clause with the Select Statement Learn Oracle - How to use the SELECT Statement Learn Oracle - How to use the Transactional Control Statements in SQL Learn Oracle - How to use PL SQL Learn Oracle - Data Types in PL SQL Learn Oracle - Exception Handling in PL SQL Learn Oracle - PL SQL Conditional Logics Learn Oracle - PL SQL Cursor Types - Explicit Cursor, Implicit Cursor Learn Oracle - PL SQL Loops Learn Oracle - Procedure Creation in PL SQL Learn Oracle - Select Statement with WHERE Cause Learn Oracle - SQL Operators and their Precedence Learn Oracle - Using Case Function, Decode Function in SQL Learn Oracle - Using Logical Operators in the WHERE Clause of the Select Statement Learn Oracle - Using Rollup Function, Cube Function Learn Oracle - Using Set Operators in SQL Learn Oracle - What are the Different SQL Data Types Learn Oracle - What are the different types of Databases Visit Pebbles Official Website - http://www.pebbles.in Subscribe to our Channel – https://www.youtube.com/channel/UCNNjWVsQqaMYccY044vtHJw?sub_confirmation=1 Engage with us on Facebook at https://www.facebook.com/PebblesChennai Please Like, Share, Comment & Subscribe
Views: 2190 Pebbles Tutorials
SQL 055 Data Types, Date Time Timestamp Data, TIME WITH TIME ZONE
 
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Explains the Date, Time and Timestamp data types, TIME WITH TIME ZONE. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.
Views: 1991 cbtinc
Oracle DBTIMEZONE Function
 
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https://www.databasestar.com/oracle-timezone-functions/ The Oracle DBTIMEZONE function returns the database timezone offset of the database. It returns it in the format of +/- TZH:TZM, or the time zone region name. It’s useful to know what timezone the database is in when working with dates and different time zones, as it can impact the queries you write. The syntax for this function is quite simple: DBTIMEZONE There are no parameters - just the function name. You can’t actually change the timezone of the database using this function. It uses the timezone of the operating system of the server the database runs on. It’s similar to the SESSIONTIMEZONE function, but that function returns the timezone of your session and not the database server. It’s also similar to the SYSTIMESTAMP function, but that function returns the date, time, and timezone of the database, where DBTIMEZONE just returns the timezone. For more information about the Oracle DBTIMEZONE function, including all of the SQL shown in this video and the examples, read the related article here: https://www.databasestar.com/oracle-timezone-functions/
Views: 103 Database Star
11. CHAR, VARCHAR and TEXT Data Type in SQL (Hindi)
 
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Please Subscribe Channel Like, Share and Comment Visit : www.geekyshows.com
Views: 33166 Geeky Shows
SQL 053 Data Types, Date Time Timestamp Data, DATE
 
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Explains the Date, Time and Timestamp data type DATE. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.
Views: 934 cbtinc
SQL 054 Data Types, Date Time Timestamp Data, TIME
 
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Explains the Date, Time and Timestamp data types, TIME. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.
Views: 568 cbtinc
Total seconds from hours, minutes and timestamp
 
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Explaining how to get total seconds from timestamp if it is having hours and minutes.
Views: 99 Didzis Lauva