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How to Convert Rows into Columns in Oracle | Oracle | Oracle Tutorials
 
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Converting rows into Columns. Transpose rows in to columns.
Oracle sql Interview Question : How to change rows to column
 
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This video tutorial talks about the frequently asked oracle sql interview question of changing rows to the column. Based on the given scenario, we are asked to change the presentation of data in a table with 3 rows and 2 column to 3 columns and 2 rows. Decode Function in oracle https://youtu.be/YUAjPMjqMws Pivot and unpivot in oracle https://youtu.be/6s0DI1YcWIM
Views: 18267 Kishan Mashru
Transpose Rows into Columns in Oracle Database
 
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Transpose rows to columns in Oracle , rows into columns in Oracle
Views: 420 Adam Tech
How to transpose column to row in sql
 
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Hi friends today we will learn how to transpose column data into row of table. #transposecolumntorow Oracle database Unbeatable,Unbreakable Platform..
Views: 17354 Oracle World
How To Transpose Columns To Rows In Oracle
 
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Columns To Rows In Oracle
Views: 547 Adam Tech
Part 6   Transform rows into columns in sql server
 
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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/2014/06/part-6-transform-rows-into-columns-in.html This is another common sql server interview question. We will be using Countries table in this example. SQL to create the table Create Table Countries ( Country nvarchar(50), City nvarchar(50) ) GO Insert into Countries values ('USA','New York') Insert into Countries values ('USA','Houston') Insert into Countries values ('USA','Dallas') Insert into Countries values ('India','Hyderabad') Insert into Countries values ('India','Bangalore') Insert into Countries values ('India','New Delhi') Insert into Countries values ('UK','London') Insert into Countries values ('UK','Birmingham') Insert into Countries values ('UK','Manchester') Here is the interview question. Write a sql query to transpose rows to columns. Using PIVOT operator we can very easily transform rows to columns. Select Country, City1, City2, City3 From ( Select Country, City, 'City'+ cast(row_number() over(partition by Country order by Country) as varchar(10)) ColumnSequence from Countries ) Temp pivot ( max(City) for ColumnSequence in (City1, City2, City3) ) Piv
Views: 204239 kudvenkat
XMLTABLE : Convert XML into Rows and Columns using SQL
 
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This video gives a quick overview of the XMLTABLE functionality, which can be used to convert XML documents in to rows and columns in SQL. For more information see: https://oracle-base.com/articles/misc/xmltable-convert-xml-data-into-rows-and-columns-using-sql https://oracle-base.com/articles/misc/sqlxml-sqlx-generating-xml-content-using-sql Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Mike Hichwa : Twitter : https://twitter.com/mikehichwa1 Cameo appearances are for fun, not an endorsement of the content of this video. All trademarks, product names and logos are the property of their respective owners.
Views: 23762 ORACLE-BASE.com
PIVOT Tutorial - generating dynamic column with PIVOT Interview Question SQL
 
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In this lecture you will learn about PIVOT operator and using it to generate dynamic columns.PIVOT is very use full operator to convert values into columns. PIVOT: •Convert your output from (values)vertical order to horizontal(making columns) one Topic to cover: •PIVOT example •PIVOT syntax •Interview Question •PIVOT on northwind •Dynamic PIVOT query http://www.techsapphire.in/index/pivot_sql_lesson_with_generating_dynamic_columns_with_pivot/0-158
Views: 31522 techsapphire
SQL Tutorial - How to Transform Column into Row
 
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In this tutorial, I will show you how to transform column into row using UNPIVOT in SQL Server
Views: 2129 Candahar dot Com
PL/PDF Oracle table rows and columns in PDF
 
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How to implement the DOCX template for Oracle table printing in PDF. website: http://www.plpdf.com twitter: http://twitter.com/plpdf linkedin: https://www.linkedin.com/company/pl-pdf facebook: http://facebook.com/plpdf
Views: 923 PL/PDF
Compression Options for Oracle Database
 
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Held on August 9 2018 This session by Gregg Christman focuses on general questions and insights regarding Oracle Basic Compression, Oracle OLTP Table Compression and Oracle Advanced Row Compression. Here is a quick guide to the highlights: 2:25 Basic vs. Advanced Row Compression comparison 4:55 Should you expect the same compression ratio with Basic and Advanced Row Compression? 8:29 Should you compress all tables and partitions? 15:50 What is the overhead associated with Advanced Row Compression? 17:06 Do I need to change my application to use compression? 17:31 Who uses Advanced Row Compression? 18:35 Is there any ongoing administration with Advanced Row Compression 20:43 When does updated data get compressed? 26:30 What role does PCTFREE play in updates and compression? 28:44 Does Advanced Row Compression work with Oracle Encryption? 29:34 Does enabling compression online or offline make a difference? 31:38 What are the typical compression ratios with Basic and Advanced Row Compression? 32:56 Are there any suggested MOS notes related to compression? 34:12 Feedback about ACO from customers AskTOM Office Hours offers free, monthly training and tips on how to make the most of Oracle Database, from Oracle product managers, developers and evangelists. https://asktom.oracle.com/ Oracle Developers portal: https://developer.oracle.com/ Sign up for an Oracle Cloud trial: https://cloud.oracle.com/en_US/tryit music: bensound.com
Views: 597 Oracle Developers
How to use Pivot and Unpivot? (how to change rows to column and column to rows)
 
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This is a video tutorial on using pivot and unpivot operators to change rows to column and columns to rows when needed, the video also demonstrates a way to change from rows to column without using the pivot operator which can be helpful if you are using and older version of oracle or some other database without the feature of pivot and unpivot. Both the operators are explained with an example for better understanding
Views: 8239 Kishan Mashru
How to Parse XML in Oracle
 
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This Video Shows 1. How to Read and parse XML in Oracle using EXTRACTVALUE and XMLTABLE. 2. When to use extractvalue and XMLTable. 3. Brief Introduction to XMLPATH
Views: 14369 yrrhelp
How to Transform Multiple Row Data Into A Single Row
 
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You don't need a macro to such kind of data transformation. Excel PowerQuery can handle it smoothly. 👍🏻fshaikh Excel Master https://www.facebook.com/fshaikhExcelMaster/ 👥Join The Facebook Group - https://www.facebook.com/groups/fshaikhExcelMaster/ *********************************************************** You can check the following videos as well How To Use IF Function In Excel macOS & Windows user https://youtu.be/K4W4wFznEWQ 🔧How To Install Power Query For Excel 2010 & 2013 https://youtu.be/uZCXgtPIK9Y 🆒Transform Your Data from Single Column To Table Structure POWER QUERY https://youtu.be/l1mVyuoKMEU
SQL Magic: Dynamic Pivot, Polymorphic Table Functions and More
 
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In October's session, Chris Saxon covered SQL magic, including the following highlights: - 0:50 - how to find table name for index (sub)partitons from *_ind_(sub)partitions - 2:00 - SQL Magic! the dynamic pivot update; converting rows & columns in a table via an update statement - 8:30 - Polymorphic table functions; the describe function & fetch_rows procedure; PTFs and the optimizer; examples on LiveSQL.oracle.com. AskTOM Office Hours offers free, monthly training and tips on how to make the most of Oracle Database, from Oracle product managers, developers and evangelists. Music by bensound.com https://asktom.oracle.com/ Oracle Developers portal: https://developer.oracle.com/ Sign up for an Oracle Cloud trial: https://cloud.oracle.com/en_US/tryit Music by bensound.com
Views: 449 Oracle Developers
MS Word Table: How to Convert Row to Column, Column to Row
 
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Convert row to column, column to row in ms word table. Click here for more detail..,http://www.bsocialshine.com/2016/06/ms-word-table-how-to-convert-row-to.html
Views: 12463 MJ Tube
Pivot & Unpivot: Databases for Developers #14
 
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Sometimes you want to convert rows to columns. Or convert columns back into rows. Luckily SQL has two clauses to help you do this: PIVOT & UNPIVOT Using these you can easily transform your rows to columns and back again. Want more? Take the course: https://devgym.oracle.com/pls/apex/dg/class/databases-for-developers-next-level.html Read the blog post: https://blogs.oracle.com/sql/how-to-convert-rows-to-columns-and-back-again-with-sql-aka-pivot-and-unpivot Read the docs: PIVOT: https://docs.oracle.com/en/database/oracle/oracle-database/18/dwhsg/sql-analysis-reporting-data-warehouses.html#GUID-05BB22CD-0F53-4C90-AE84-CE3F88DBD591 UNPIVOT: https://docs.oracle.com/en/database/oracle/oracle-database/18/dwhsg/sql-analysis-reporting-data-warehouses.html#GUID-B0AC9284-DDC1-4EF7-84CD-A27DF7F8DD57 Need help with SQL? Ask us over on AskTOM: https://asktom.oracle.com Twitter: https://twitter.com/ChrisRSaxon Daily SQL Twitter tips: https://twitter.com/SQLDaily All Things SQL blog: https://blogs.oracle.com/sql/ ============================ The Magic of SQL with Chris Saxon Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 1414 The Magic of SQL
UNPIVOT in SQL Server
 
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sql server convert columns to rows in a table sql server transpose columns to rows unpivot in sql server example sql server unpivot example In this video we will discuss UNPIVOT operator in SQL Server. PIVOT operator turns ROWS into COLUMNS, where as UNPIVOT turns COLUMNS into ROWS. We dicussed PIVOT operator in Part 54 of SQL Server tutorial. Please watch Part 54 before proceeding. http://csharp-video-tutorials.blogspot.com/2012/10/pivot-operator-in-sql-server-part-54.html Let us understand UNPIVOT with an example. We will use the following tblProductSales table in this demo. SQL Script to create tblProductSales table Create Table tblProductSales ( SalesAgent nvarchar(50), India int, US int, UK int ) Go Insert into tblProductSales values ('David', 960, 520, 360) Insert into tblProductSales values ('John', 970, 540, 800) Go Write a query to turn COLUMNS into ROWS. SELECT SalesAgent, Country, SalesAmount FROM tblProductSales UNPIVOT ( SalesAmount FOR Country IN (India, US ,UK) ) AS UnpivotExample Text version of the video http://csharp-video-tutorials.blogspot.com/2015/10/unpivot-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/10/unpivot-in-sql-server_10.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 48279 kudvenkat
Transposing data in a report Flip rows to columns in Oracle SQL
 
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In this training video we will learn load data in a report, Flip rows to columns in Oracle SQL
Views: 290 Spod ssppoodd
SAP HANA Row vs Column store tables
 
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You can get any course for $9.99 at Udemy using below links https://www.udemy.com/sap-hana-sql/?couponCode=HAPPY_LEARNING https://www.udemy.com/slt-for-hana/?couponCode=HAPPY_LEARNING https://www.udemy.com/sap-hana-sql-step-2/?couponCode=HAPPY_LEARNING For more details check out http://time4hana.com *** This is the first comprehensive online course on SAP HANA SQL & SQL Scripting *** Welcome to comprehensive SAP HANA SQL & SQL Scripting course. You want to learn how to develop SQL skills on HANA? This course is for you. It is the perfect time to learn HANA technologies. There are a lot of requirement for HANA Developers, as many SAP clients moving from traditional databases to HANA. This comprehensive tutorial teaches required skills to become HANA SQL Developer. This course covers almost all features SQL and SQL Script with real-world example (including Design time objects and Core Data Services) Here are few highlights of the course: 1. Introduce HANA Express Edition (HXE) which is a free HANA Developer version for learning and prototyping purpose. 2. Walk you through steps to setup your HANA studio for the first time. 3. Key HANA concepts (Row store vs Column store and Delta Merge) 4. Multiple sample databases created by us for learning and practice 5. Start with very basic SELECT SQL statements to advanced stored procedures using SQL scripting. 6. Covers each and every key word of SQL & SQL scripting. 7. More than 5 ways to create a table. 8. Imperative and Declarative statements. 9. Extensive content on SQL scripting. Scalar UDF's Table UDF's Stored Procedures Scripted Calculation views. Table Variables, Input Parameters etc.. 10. Provided detailed explanation on best practices to follow and real world examples. 11. HANA Certification SQL part is covered. 12. Special features like IDENTITY, Dynamic Filters, Exception handling and much more. 13. Development Objects and Designtime Objects. 14. Core Data Services (CDS). 15. By end of this course, you will be very confident on SQL & SQL scripting. This is a comprehensive course and we'll keep adding the content when new features available as part of new HANA versions. Please feel free to check out course content to know more about this course.
Views: 15001 Time4 HANA
Converting columns into rows in SQL Server
 
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sql unpivot columns to rows how to convert rows into columns in sql server 2017 convert column to row in sql server
Views: 374 C Plus+
Converting JSON Data to Relational Data in Oracle 12C
 
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JSON data is nice, but it is difficult to work with directly in Oracle. By converting it to relational data (rows and columns) we can easily work with it. This video demonstates how to convert JSON data to relational data using json_table.
Views: 6060 Pretty Printed
How To Transform MySQL Rows Into Column And Become A Pivot Table Like OLAP Dimension
 
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In this video you will learn on How To Transform MySQL Rows Into Column And Become A Pivot Table Like an OLAP Dimension. It can reduce so much time especially if you have a huge data. Di dalam video ini saya akan menjelaskan tentang bagaimana cara merubah record MySQL menjadi kolom seperti pivot table melalui query tanpa menggunakan OLAP atau analysis service. Convert MySQL Rows, Convert MySQL Rows Into Column, Transform MySQL Rows, Merubah record menjadi kolom, Merubah baris menjadi kolom
Views: 8131 Yadishare Tutorial
Convert datatypes without downtime!
 
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Made a mistake in your database design? Do you need to change the datatype of a column without inflicting lengthy downtime for your users? It's easier than you think. blog: https://connor-mcdonald.com twitter: https://twitter.com/connor_mc_d Subscribe for new tech videos every week
Views: 263 Connor McDonald
How to Decode XML In Oracle Database?
 
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Sample Code Link: https://github.com/arulxaviers/Decode_XML_In_Oracle Thi video Will Teach you How to Decode XML In Oracle Database? how to read xml file in oracle pl sql extract value from xml oracle dbms_xmlgen.convert ampersand oracle xmltable example oracle xml query examples how to parse xml in oracle pl sql xml parsing in oracle 11g oracle xmltype extract example XMLTYPE XMLREAD Decode XML in Oracle
Views: 3000 Oracle PL/SQL World
Difference Between Row Level Storage(Oracle) and Column Level Storage (Vertica)
 
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With changing Needs New technologies are coming in market even the ways to store data is changing, The video gives a very high level overview of the differences btw Columnar and Row Based storage database
Views: 7168 Tech Coach
ORACLE SQL AND PL/SQL INTERVIEW QUESTION : DIFFERENCE BETWEEN ROWID AND ROWNUM WITH EXAMPLE
 
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In this video tutorial, we discuss the pseudo column rowid and rownum in oracle sql. After watching this video you would be able to understand the basic difference between rowid and a rownum pseudo columns of oracle database. Rowid returns the exact location of the row in the database, hence whenever you retrive a record based on rowid, it is the fastest retrival possible. Whereas for each row returned by a query, the ROWNUM pseudocolumn returns a number indicating the order in which Oracle selects the row from a table or set of joined rows. For more such videos visit out complete list of videos on www.youtube.com/c/kishanmashru Visit or blog www.oracleplsqlblog.com
Views: 1978 Kishan Mashru
Analytics: 22 Converting string lists into rows
 
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blog: https://connor-mcdonald.com Welcome to the KISS video series. Solving problems that typically required complicated SQL in the past, that can now be easily solved with Analytic SQL syntax. In this session, we use analytics to convert a delimited string into a list of rows https://livesql.oracle.com/apex/livesql/file/content_C40G9LF09VJ8W43VGG7ZXDAMO.html
Views: 390 Connor McDonald
Oracle Database11g tutorials 10 ||  SQL Single Row Function (SQL Functions )
 
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Single row functions Tool used in this tutorial is command prompt. This tutorial series is part of SQL expert exam certification training. if you are preparing for SQL certification you can use my tutorials. This SQL Tutorial is a part of free training. Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=j7eYO7 Contacts Email [email protected] Twitter https://twitter.com/rebellionrider Instagram http://instagram.com/rebellionrider Facebook. https://www.facebook.com/imthebhardwaj Linkedin. http://in.linkedin.com/in/mannbhardwaj/ Thanks for linking, commenting, sharing and watching more of our videos This is Manish from The Code makers ============================================ in this oracle database tutorial we will see what are SQL FUNCTIONS. SQL functions are divided into two categories 1st is Single Row Functions And another one is Multiple row function which is also known as aggregate functions. But in today's SQL tutorial we will concentrate on Single Row Functions. Single-row functions operate on one row at a time and return one row of output for each input row. Single row functions are capable of manipulating data items and modifying the data types. Single row functions return one result per row and act on each row that is returned. Single row functions can accept one or more arguments and return one value. These arguments can be a column or an expression. With oracle we have 5 types of Single Row Functions 1. Character Functions 2. Number Functions 3. General Functions 4. Conversion Functions and 5. Date Functions. Character Functions are further divided into two categories. 1st is Case- manipulation functions and 2nd is Character Manipulation functions. We have 3 case manipulation functions Lower, upper and initcap and 7 character manipulation functions Sql functions concat, substr, length, instr, lpad, rpad, trim and replace. In our future video we will see what these functions are and what they do along with other SQL function. That's it for today's sql tutorial. Hope you enjoyed watching. Please don't forget to subscribe and like. Have a good day. This is Manish.
Views: 96429 Manish Sharma
Oracle SQL Loader - How to load data from file(.csv, .dat, .txt) into table - Tutorial - 3
 
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This video is the third tutorial on Oracle SQL*Loader tutorial series created by Kishan Mashru. Oracle SQL Loader utility is used to load data from flat files like .csv files, .dat files, .txt files into Oracle database tables. In this video tutorial, we demonstrated how to load data from excel to oracle using sql loader We showed the SQL Loader control file example and loaded data from the .csv file into the database table. Check out the first video: https://youtu.be/fSV51bljrwY Check out the second video: https://youtu.be/ogidUWHHRL8 Check out the advantages of using TRUNCATE over a DELETE from the following video: Delete VS Truncate : https://youtu.be/u76wMm2byXo #KishanMashru #Oracle #SqlLoader #SqlLoaderExample #LoadCSV #LoadExcel #SQLandPLSQL #OracleSqlLoader #ETL #database
Views: 4749 Kishan Mashru
SQL Server -  Concatenate Multiple Rows Into Single String
 
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This video will show you how to concatenate multiple rows into a single string in SQL SERVER. Of course there are multiple solutions for this situation, but this is the way I prefer doing it. :)
Views: 3986 JiFacts
Transpose rows to columns using Talend ETL
 
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This Video tutorials aims at converting rows to columns using Talend Open studio. For more details visit http://www.vikramtakkar.com/2013/09/transpose-columns-to-rows-or-split.html For more Tutorials visit: www.vikramtakkar.com
Views: 17904 Vikram Takkar
oracle date and time functions
 
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Video from our Oracle SQL course. Check out the full course at.. http://learn.hackpress.co/courses/oracle-sql-learning-by-example
Views: 47439 etldeveloper
Get Table Names with Column Names and Data Types in SQL Server - SQL Server Tutorial
 
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In this video ,we will generate the script that will return us all the table names with column names and data type of those columns. We often need this information. Let's say we are going to prepare mapping document for load the data from Source Database to Destination database. We can get the list of all tables with column names and data types from Source Database and Destination Database and then paste in Excel and map the required input columns to output columns for ETL Process. Blog link with scripts used in video http://sqlage.blogspot.com/2015/02/get-all-tables-with-column-names-and.html
Views: 50825 TechBrothersIT
How to Transpose Rows Into Columns in Sql Server
 
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sql server - How to transpose rows into columns in SQL How to Convert Rows to Columns
Views: 1051 C Plus+
Ask Tom Office Hours SQL | March 08, 2018
 
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AskTOM Office Hours offers free, open Q&A sessions with Oracle Database experts. Learn how to make the most of SQL with Chris Saxon, of the AskTOM answer team. This session will kick off by looking at how to convert rows to columns with PIVOT. https://developer.oracle.com/ https://cloud.oracle.com/en_US/tryit music: bensound.com
Views: 271 Oracle Developers
Single Row Conversion Functions Querying a table in Oracle SQL
 
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This video shows how to Create Single Row Conversion Functions in Oracle SQL. Try to share these videos for poor students and subscribe this channel for more upcoming other technical videos.
Views: 24 Technology mart
Merging multiple columns and rows into single row in mysql
 
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Merging multiple columns and rows into single row in mysql using concat and group_concat
Views: 2554 Techie Savy
KISS series on Analytics: 23 Converting rows into string lists
 
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Welcome to the KISS video series. Solving problems that typically required complicated SQL in the past, that can now be easily solved with Analytic SQL syntax. In this session, we use analytics to convert a list of rows into a delimited string using listagg. https://livesql.oracle.com/apex/livesql/file/content_C5NPSOT3UKM9D7BG5J75SPQ2D.html Watch the entire Analytics playlist at https://www.youtube.com/playlist?list=PLJMaoEWvHwFJDyhMLCkNSSUQWw9waFkIj ========================================­­­­============== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 572 Connor McDonald
Tutorial : Creating Oracle APEX DML form Step by Step manually
 
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Creating Oracle APEX DML form manually. In this video we have tested the concepts of DMLand ARF Processes. The Video shows what really happens when we create a DML Form with wizard.
Views: 14430 Oracle Testlab
Pandas Tutorial 14: Read Write Data From Database (read_sql, to_sql)
 
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Pandas' read_sql, read_sql_table, read_sql_query methods provide a way to read records in database directly into a dataframe. to_sql on dataframe can be used to write dataframe records into sql table. Using sqlalchemy engine, one can interface easily with mysql, postgres, oracle databases. Code link: https://github.com/codebasics/py/blob/master/pandas/21_sql/pandas_sql.ipynb Website: http://codebasicshub.com/ Facebook: https://www.facebook.com/codebasicshub Twitter: https://twitter.com/codebasicshub Google +: https://plus.google.com/106698781833798756600
Views: 26886 codebasics
JSON in the Oracle Database: Auto-Generate Views and Virtual Columns
 
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In part 2 of the JSON Dataguide series, Beda Hammerschmdt, consulting member of technical staff at Oracle, outlines how to auto-genrate views and virtual columns from JSON data. https://developer.oracle.com/ https://cloud.oracle.com/en_US/tryit
Views: 604 Oracle Developers
SQL script to insert into many to many table
 
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Text Article http://csharp-video-tutorials.blogspot.com/2017/02/sql-script-to-insert-into-many-to-many.html Slides http://csharp-video-tutorials.blogspot.com/2017/02/sql-script-to-insert-into-many-to-many_6.html SQL Server Interview Questions and Answers text articles & slides http://csharp-video-tutorials.blogspot.com/2014/05/sql-server-interview-questions-and.html SQL Server Interview Questions and Answers playlist https://www.youtube.com/playlist?list=PL6n9fhu94yhXcztdLO7i6mdyaegC8CJwR All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss how to insert data into a table that has many-to-many relationship Create table Students ( Id int primary key identity, StudentName nvarchar(50) ) Go Create table Courses ( Id int primary key identity, CourseName nvarchar(50) ) Go Create table StudentCourses ( StudentId int not null foreign key references Students(Id), CourseId int not null foreign key references Courses(Id) ) Go Students - Id column is identity column Courses - Id column is identity column StudentCourses - StudentId and CourseId columns are foreign keys referencing Id column in Students and Courses tables As you can see, StudentCourses is a bridge table that has many to many relationship with Students and Courses tables. This means a given student can be enrolled into many courses and a given course can have many students enrolled. Below is the question asked in an interview for SQL Server Developer role. Write a SQL script to insert data into StudentCourses table. Here are the rules that your script should follow. 1. There will be 2 inputs for the script Student Name - The name of the student who wants to enroll into a course Course Name - The name of the course the student wants to enroll into 2. If the student is already in the Students table, then use that existing Student Id. If the student is not already in the Students table, then a row for that student must be inserted into the Students table, and use that new student id. 3. Along the same lines, if the course is already in the Courses table, then use that existing Course Id. If the course is not already in the Courses table, then a row for that course must be inserted into the Courses table, and use that new course id. 4. There should be no duplicate student course enrollments, i.e a given student must not be enrolled in the same course twice. For example, Tom must not be enrolled in C# course twice. Answer : To avoid duplicate student course enrollments create a composite primary key on StudentId and CourseId columns in StudentCourses table. With this composite primary key in place, if someone tries to enroll the same student in the same course again we get violation of primary key constraint error. Alter table StudentCourses Add Constraint PK_StudentCourses Primary Key Clustered (CourseId, StudentId) Here is the SQL script that inserts data into the 3 tables as expected Declare @StudentName nvarchar(50) = 'Sam' Declare @CourseName nvarchar(50) = 'SQL Server' Declare @StudentId int Declare @CourseId int -- If the student already exists, use the existing student ID Select @StudentId = Id from Students where StudentName = @StudentName -- If the course already exists, use the existing course ID Select @CourseId = Id from Courses where CourseName = @CourseName -- If the student does not exist in the Students table If (@StudentId is null) Begin -- Insert the student Insert into Students values(@StudentName) -- Get the Id of the student Select @StudentId = SCOPE_IDENTITY() End -- If the course does not exist in the Courses table If (@CourseId is null) Begin -- Insert the course Insert into Courses values(@CourseName) -- Get the Id of the course Select @CourseId = SCOPE_IDENTITY() End -- Insert StudentId & CourseId in StudentCourses table Insert into StudentCourses values(@StudentId, @CourseId) If required, we can very easily convert this into a stored procedure as shown below. Create procedure spInsertIntoStudentCourses @StudentName nvarchar(50), @CourseName nvarchar(50) as Begin Declare @StudentId int Declare @CourseId int Select @StudentId = Id from Students where StudentName = @StudentName Select @CourseId = Id from Courses where CourseName = @CourseName If (@StudentId is null) Begin Insert into Students values(@StudentName) Select @StudentId = SCOPE_IDENTITY() End If (@CourseId is null) Begin Insert into Courses values(@CourseName) Select @CourseId = SCOPE_IDENTITY() End Insert into StudentCourses values(@StudentId, @CourseId) End Use the following statement to execute the stored procedure Execute spInsertIntoStudentCourses 'Tom','C#'
Views: 93784 kudvenkat
Bulk Processing in PL/SQL
 
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"Row by row = slow by slow" - one of Tom Kyte's more famous and catchy memes. Row by row processing of data is so not the way to go. How to avoid it? Fully leverage SQL to do set processing and if that doesn't totally do it for you, then "fall back" on FORALL and BULK COLLECT. These are just about the most important performance features of PL/SQL, and Steven Feuerstein takes a close look in our October Office Hours session. Highlights: 00:30 Introduction, review of Office Hours program 03:32 Why is bulk processing needed? 10:19 BULK COLLECT to retrieve more than one row with each fetch 15:25 FORALL for repeated execution of non-query DML 30:13 Converting row-by-row to bulk processing Then on to Q & A. 39:27 How can I convince developers of the performance benefit of BULK COLLECT? 42:00 Use global temporary tables + SQL instead of FORALL? AskTOM Office Hours offers free, monthly training and tips on how to make the most of Oracle Database, from Oracle product managers, developers and evangelists. Music by bensound.com https://asktom.oracle.com/ Oracle Developers portal: https://developer.oracle.com/ Sign up for an Oracle Cloud trial: https://cloud.oracle.com/en_US/tryit Music by bensound.com
Views: 819 Oracle Developers
SQL/XML (SQLX) : Generating XML using SQL in Oracle
 
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This video gives an overview of the SQL/XML (SQLX) functionality, which can be used to generate XML documents using SQL. For more information see: https://oracle-base.com/articles/misc/sqlxml-sqlx-generating-xml-content-using-sql Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Kevin Closson : Blog : https://kevinclosson.net/ Twitter : https://twitter.com/kevinclosson Cameo appearances are for fun, not an endorsement of the content of this video. All trademarks, product names and logos are the property of their respective owners.
Views: 8943 ORACLE-BASE.com
Oracle XML Publisher - Cross Tab - Pivot Table Report
 
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Oracle XML Publisher - Cross Tab - Pivot Table Report
Views: 4319 Lead Technologies
Rows to columns using pivot table
 
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When the source is relational and we have to perform rows to column conversion, we can use Pivot.
Views: 222 LearningMart
Sql &plsql Interview 13-UNPIVOT FUNCTION(COLUMN BASED DATA INTO SEPARATE ROWS)
 
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Join My Facebook Page to Learn SQl,PLSQL,FORMS, REPORTS,ORACLE TOOLS,DISCOVERER REPORTS Update Videos... https://www.facebook.com/Oracle-SQL-PLSQL-Practical-Discussion-334342290310499/?notif_id=1514905617324010 whatsup number:-08508598428
Views: 97 Manikandan R
Convert Column Data Fields to Row Data Fields
 
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Check out my Blog: http://exceltraining101.blogspot.com Sometimes you have columns doing double duty as a data. This video shows how to convert or move a column field into a row data field using the consolidated range option in the pivot table wizard. #exceltips #exceltipsandtricks #exceltutorial #doughexcel --------------------- Excel Training: https://www.exceltraining101.com/p/training.html Excel Books: https://www.amazon.com/shop/dough
Views: 224044 Doug H

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