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UPDATE STATEMENT WITH JOIN IN ORACLE SQL
 
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This video demonstrates how user can update data of a particular table(t1), based on the join condition with other table(t2). So it would be a easy way to ditch the for-loop, and check for the condition every time. What was to be achieved from the for-loop can be achieved with a single simple update statement. A simple trick to update data in table based on some conditional data in some another table, would help you to increase the performance of your code massively. For ex : UPDATE TABLE1 t1 SET COL1 = (SELECT COL FROM TABLE2 t2 where t1.col = t2.col);
Views: 3808 Kishan Mashru
Update Table with inner join in SQL server
 
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Update Table with inner join in SQL server sql server SQL server tutorial SQL server beginner tutorial SQL server tutorial 2016 SQL server interview SQL server interview question SQL server tutorial beginner to advance sql server 2016 tutorial for beginners sql server 2016 sql server interview questions and answer sql tutorial sql tutorial for beginners sql queries tutorial sql server management studio 2016 interview question in sql server
Views: 2860 sadiq msi
SQL Joins Tutorial for Beginners - Inner Join, Left Join, Right Join, Full Outer Join
 
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Learn how to create SQL Joins. The first 10 minutes teach you the basics. Inner Join, Left Outer Join, Right Outer Join, and Full Outer Join. The second 10 minutes show you are few techniques that will help you as you start building joins. READ THE ORIGINAL ARTICLE WITH THE TABLE SCRIPS http://www.sqltrainingonline.com/sql-joins-tutorial-for-beginners/ YOUTUBE NEWS UPDATES http://www.youtube.com/user/sqltrainingonline VISIT SQLTRAININGONLINE.COM FOR TONS MORE VIDEO NEWS & TIPS http://www.sqltrainingonline.com SUBSCRIBE FOR OTHER SQL TIPS AND NEWS! http://www.youtube.com/subscription_center?add_user=sqltrainingonline SUBSCRIBE TO OUR EMAIL LIST! http://www.sqltrainingonline.com LET'S CONNECT! Facebook: http://facebook.com/SQLTrainingOnline Twitter: http://twitter.com/sql_by_joey Linkedin: http://linkedin.com/in/joeyblue SQLTrainingOnline: http://www.sqltrainingonline.com
Views: 172266 Joey Blue
SQL Server join :- Inner join,Left join,Right join and full outer join
 
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For more such videos visit http://www.questpond.com For more such videos subscribe https://www.youtube.com/questpondvideos?sub_confirmation=1 Also watch Learn Sql Queries in 1 hour :- https://www.youtube.com/watch?v=uGlfP9o7kmY See our other Step by Step video series below :- Learn Angular tutorial for beginners https://tinyurl.com/ycd9j895 Learn MVC Core step by step :- http://tinyurl.com/y9jt3wkv Learn MSBI Step by Step in 32 hours:- https://goo.gl/TTpFZN Learn Xamarin Mobile Programming Step by Step :- https://goo.gl/WDVFuy Learn Design Pattern Step by Step in 8 hours:- https://goo.gl/eJdn0m Learn C# Step by Step in 100 hours :- https://goo.gl/FNlqn3 Learn Data structures & algorithm in 8 hours :-https://tinyurl.com/ybx29c5s Learn SQL Server Step by Step in 16 hours:- http://tinyurl.com/ja4zmwu Learn Javascript in 2 hours :- http://tinyurl.com/zkljbdl Learn SharePoint Step by Step in 8 hours:- https://goo.gl/XQKHeP Learn TypeScript in 45 Minutes :- https://goo.gl/oRkawI Learn webpack in 50 minutes:- https://goo.gl/ab7VJi Learn Visual Studio code in 10 steps for beginners:- https://tinyurl.com/lwgv8r8 Learn Tableau step by step :- https://tinyurl.com/kh6ojyo Preparing for C# / .NET interviews start here http://www.youtube.com/watch?v=gaDn-sVLj8Q In this video we will try to understand four important concepts Inner joins,Left join,Right join and full outer joins. We are also distributing a 100 page Ebook ".Sql Server Interview Question and Answers". If you want this ebook please share this video in your facebook/twitter/linkedin account and email us on [email protected] with the shared link and we will email you the PDF.
Views: 878664 Questpond
SQL Tutorial - 21: The UPDATE Query
 
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In this tutorial we'll check out the UPDATE Query which is used to update/change records in a table.
Views: 92050 The Bad Tutorials
Ejemplo simple de SELECT con JOIN de tablas
 
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Ejemplo simple sobre la selección de datos desde más de una tabla, haciendo combinaciones tanto internas como externas (INNER, OUTER JOIN). Adicionalmente, comparar la notación SQL ANSI con la notación ORACLE
Views: 137839 EscuelaITbbdd
Joining two tables two different databases
 
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How to Join Two tables with two different database in sql server?
Views: 10853 Suresh Molabanti
Merge Statement in Oracle SQL with Example (UPDATE/DELETE or INSERT)
 
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This video demonstrates how to write a Merge Statement in oracle sql, how it is useful in doing a conditional update or delete or both of them when the condition between the target table and source table is evaluated to true, and how we can insert the record into the target table when condition is evaluated to false. The video also shows the use of UPDATE, DELETE and INSERT with Merge, and also the various possible ways to use a Merge statement!!!
Views: 9571 Kishan Mashru
SQL Inner Join Multiple Tables with SUM Tutorial - SQL 2008/2012/2016/2017
 
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Use inner joins with multiple tables to create reports. Uses aliases, and the SUM aggregate function to demonstrate the flexibility of the join statement. Get the SQL script to create the database and run the exercies in the video here: https://www.qewbi.com/sql/scripts/qewbijoins.zip
Views: 142445 Edward Kench
Oracle Join Tables تعليم أوراكل
 
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by Mohamed El Desouki - محمد الدسوقى [email protected] Tel :00966 553450836 جامعة سلمان بن عبد العزيز - السعودية - الخرج How to select data from more than one table using Join. كيفية الربط بين أكثر من جدول Text Book: Fundamentals of Database Systems, 5th Edition, by Elmasri/Navathe, published by Addison-W oracle create table statement oracle drop table statement oracle constraints database constraints primary key constraint foreign key constraint check constraint null not null constraint unique constraint insert into statement update statement delete statement select statement basic query where clause select where Like '%' Like '_' select where Like Join Tables inner join equi join
Oracle SQL: Understanding Multiple Table Joins
 
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http://www.informit.com/store/oracle-sql-livelessons-video-training-downloadable-9780134275741?WT.mc_id=Social_YT Oracle SQL: Understanding Multiple Table Joins 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: 14926 LiveLessons
Inner Join, Left Join, Right Join -  MYSQL
 
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Basic keywords explanation with example in MYSQL Workbench i.e Joins.
Views: 38367 Gattu Guntur
Tutorial#14 How to Update rows using Update Statement in Oracle SQL database
 
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In this Video, I am explaining How to update the table Rows using SQL developer In this series we cover the following topics: SQL basics, create table oracle, SQL functions, SQL queries, SQL server, SQL developer installation, Oracle database installation, SQL Statement, OCA, Data Types, Types of data types, SQL Logical Operator, SQL Function,Join- Inner Join, Outer join, right outer join, left outer join, full outer join, self-join, cross join, View, SubQuery, Set Operator. follow me on: Facebook Page: https://www.facebook.com/LrnWthr-319371861902642/?ref=bookmarks Contacts Email: [email protected] Instagram: https://www.instagram.com/lrnwthr/ Twitter: https://twitter.com/LrnWthR
Views: 102 EqualConnect Coach
SQL Inner Join with Example in Oracle 11g Database(Hindi and English)
 
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SQL Tutorial for Beginners in Hindi and English SQL Inner Join with Example in Oracle 11g Database(Hindi and English)
How to Join 3 tables in 1 SQL query
 
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Get your first month on the Joes 2 Pros Academy for just $1 with code YOUTUBE1. Visit http://www.joes2pros.com Offer expires July 1, 2015 From the newly released 2 Disc DVD set (SQL Queries Joes 2 Pros Vol2) this video shows how to join 3 tables in 1 query.
Views: 259356 Joes2Pros SQL Trainings
Joining Many Tables (Introduction to Oracle SQL)
 
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Find out how to join many tables together in SQL. The full Introduction to Oracle SQL course is available here: https://www.databasestar.com/introduction-to-oracle-sql-course/
Views: 455 Database Star
SQL JOINing Multiple Tables
 
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Jamie King of Neumont University demonstrating how to join several tables together.
Views: 139164 Jamie King
SelectTec | Aula Nº 38 | Oparador Join - Inner Join - Left Join - Right Join - Full Join  - Oracle
 
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SELECT columns FROM table1 INNER JOIN table2 ON table1.column = table2.column; ELECT columns FROM table1 LEFT JOIN table2 ON table1.column = table2.column; SELECT columns FROM table1 RIGHT JOIN table2 ON table1.column = table2.column; SELECT columns FROM table1 FULL JOIN table2 ON table1.column = table2.column;
Views: 1318 SelectTec
SQL Tutorial - 13: Inserting Data Into a Table From Another Table
 
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In this tutorial we'll learn to use the INSERT Query to copy data from one table into another.
Views: 258156 The Bad Tutorials
SQL Nested Query - Insert, Update, Select and Delete using Sub Queries
 
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SQL Nested Query - Insert, Update, Select and Delete using Sub Queries SQL tutorial for Beginners in Hindi and English
UPDATE JOIN: Actualizar campos con información de otra tabla
 
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Siempre hay que tomar medidas preventivas antes de hacer cambios importantes sobre una tabla. En este caso actualizamos los valores de una columna en base a los valores de una columna ubicada en otra tabla. Visita nuestra web: https://programacionymas.com/ ***** Síguenos en las redes sociales: Twitter ► https://twitter.com/programacionym Facebook ► https://www.facebook.com/programacionymas Suscríbete a nuestro canal: http://bit.ly/SuscribirmePYM ***** Si tienes alguna duda puedes dejar un comentario. Además recuerda dar like y compartir el video. Gracias!
Views: 10984 Programación y más
SQL SERVER - QUERIES - FROM CLAUSE - INNER JOIN and TEMP TABLES
 
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This SQL tutorial explains how to use an INNER JOIN between a normal table and a temp table. It is short ant to the point.
Views: 1730 Dave Merton
22 - T-SQL - JOINS e INNER JOIN - Selecionar dados de duas ou mais tabelas - SQL Server
 
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TSQL - JOINS e INNER JOIN - Selecionar dados de duas ou mais tabelas - SQL Server Neste vídeo vamos mostrar como é possível combinar dados de duas ou mais tabelas relacionadas em uma consulta utilizando a cláusula INNER JOIN, além de outros tipos de JOINS, no SQL Server. Contribua com a Bóson Treinamentos!: Como contribuir: http://www.bosontreinamentos.com.br/contribuir/ Por Fábio dos Reis Bóson Treinamentos: http://www.bosontreinamentos.com.br Facebook: https://www.facebook.com/bosontreinamentos/ Pinterest: https://br.pinterest.com/bosontreina/ Twitter: https://twitter.com/bosontreina Instagram: https://www.instagram.com/bosontreinamentos/ LInkedin: https://www.linkedin.com/in/f%C3%A1bio-dos-reis-06ba192a/ Outros projetos do autor: Diário do Naturalista: http://www.diariodonaturalista.com.br
Views: 96666 Bóson Treinamentos
INNER JOIN OR SIMPLE JOIN IN ORACLE SQL WITH EXAMPLE
 
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This is a video tutorial on how to retrieve data from multiple tables using simple join or inner join, the video demonstrates on how to write a simple join or inner join. It also explains the different syntax available to write an inner join, like with the JOIN and USING clause or by JOIN and ON clause. The video also demonstrates the use of alias and importance of it when using the simple join syntax.
Views: 903 Kishan Mashru
How To Insert,update,delete,join Data into a Table Using SQL Developer tool
 
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How To Insert,update,delete,join Data into a Table Using SQL Developer tool In this topic, you learn to add objects to the Query Builder interface and then create a query based on those objects. In this section, you create a query based on the EMPLOYEES and DEPARTMENTS tables. You will generate output that shows per department name, the employees who work in that department. Perform the following steps to add the EMPLOYEES table to the Query Builder. 1 . Select the Query Builder tab to open Query Builder window. 2 . Drag and drop the EMPLOYEES table from the Connections navigator to the Query Builder window. 3 . Drag and drop the DEPARTMENTS table object over to the Query Builder window, so that the two table objects are displayed in the Query Builder window. Because there are two relationships defined between the EMPLOYEES and DEPARTMENTS tables, you see two lines between the tables identifying the columns that are linked together through foreign key constraints. The two relationships are defined as: The MANAGER_ID in the DEPARTMENTS table must be a value of the EMPLOYEE_ID in the EMPLOYEES table (managers must exist as employees). The DEPARTMENT_ID in the EMPLOYEES table must be a value of the DEPARTMENT_ID in the DEPARTMENTS table (an employee's department must exist in the DEPARTMENTS table, or be null). 4 . Next, you select the columns that you want to see in the report. In the EMPLOYEES table, check the FIRST_NAME, LAST_NAME, JOB_ID, SALARY, and DEPARTMENT_ID columns. As you select these columns, note that they are added in the order that you select them into the window below the table objects. In the DEPARTMENTS table, check the DEPARTMENT_NAME column. 5 . Click Run .
Views: 1690 Narayan Mehta
SQL Server 2017 Tutorial 14 - UPDATE and DELETE with JOINS
 
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UPDATE and DELETE statements with JOINS in SQL Server. Support YPN on Patreon! http://www.patreon.com/YPN Website and Forum: http://yourprogrammingnetwork.co.uk Join us on Facebook! https://www.facebook.com/pages/Your-Programming-Network/280950122022281 Chat on Discord https://discord.gg/br3ZB3f
62. SQL JOIN Statement (Programming In Access 2013)
 
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SQL JOIN Statement in "Programming in Microsoft Access 2013". Hosted by Steve Bishop. In this free beginner video tutorial series Steve will be going over Database Development in Access, creating the User Interface, and coding the backend of the application in Visual Basic for Applications (VBA). Click here for the full playlist of "Programming in Access 2013" http://www.youtube.com/playlist?list=PLYMOUCVo86jEeMMdaaq03jQ_t9nFV737s Click here for the Work Files of this series: https://github.com/Xipooo/ProgrammingInAccess2013
Views: 37567 Programming
joins in SQL with examples [hindi]
 
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This video explains what are joins and types of joins with the help of examples.
Views: 76237 kwl zerotwonine
SQL Server Update with joining two or more table | SQL Server | Jangli Coder
 
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SQL Server Update With Joining Two or More Table, SQL Server Update Query, Update Query with join, join in update query, inner join, left join, full join, Facebook Page :- https://goo.gl/fuhjF1 Youtube :- https://goo.gl/UqixKZ blogspot :- https://goo.gl/3Q7VCw Please Like, Comment and Subscribe Our Channel
Views: 672 Jangli Coder
SQL Tutorial - 30: Using GROUP BY Clause with SQL JOINS
 
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In this tutorial we'll see how we can use the Group By clause with Joins in SQL.
Views: 50374 The Bad Tutorials
SQL Tutorial - UPDATE
 
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This video will teach you how to UPDATE data within a table with working examples, within SQL Server, we also look at the dangers of running an UPDATE statement without a WHERE clause and the impact this will have. Remember: Always take a backup of your database when running DML scripts Test your script locally Add a WHERE clause unless you want to update all data within the table Statements: UPDATE ‘table_name’ SET ‘column_name’ = ‘value’ WHERE ‘column_name’ = ‘value’ UPDATE Customers_New SET C_Last_Name = 'Masters' WHERE C_Id = 4 UPDATE multiple columns: UPDATE Customers_New SET C_1st_Line = '10 Wayside', C_2nd_Line = 'Withington', C_City = 'Telford', C_PostCode = 'TF2 1SH' WHERE C_Id = 2 UPDATE data based on a join: UPDATE A SET A.C_Last_Name = B.C_Last_Name FROM Customers AS A INNER JOIN Customers_New AS B ON A.C_Id = B.C_Id WHERE A.C_Last_Name 'not equal too' B.C_Last_Name UPDATE statements (DML) are covered in the Microsoft Exam – Querying SQL Server (70-461) 2012 / 2014. To learn how to backup and restore databases check out the video below: SQL Tutorial – Backup and Restore https://youtu.be/rtX0T_bK5-0
Views: 157 BeardedDev
122. How to Join Tables in SQL (Hindi)
 
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Please Subscribe Channel Like, Share and Comment Visit : www.geekyshows.com
Views: 48121 Geeky Shows
SQL Tutorials - Joins - Inner , Left, Right & Full
 
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Database Object: Table Work with Data of Table Joins Inner Left Outer Right Outer Full Outer Cross
SQL Aggregation queries using Group By, Sum, Count and Having
 
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From SQL Queries Joes 2 Pros (Vol2) ch4.1. Learn up to write aggregated queries.
Views: 177437 Joes2Pros SQL Trainings
ORACLE 11g: Joining of multiple tables in oracle sql | 3i Template IT Solutions
 
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ORACLE 11g: Joining of multiple tables in oracle sql | 3i Template IT Solutions https://youtu.be/oNTm9ZaAwXI how to join multiple tables in oracle 11g joining multiple tables in oracle joining multiple tables in oracle sql joining two tables in oracle joining three tables in oracle joining two tables in oracle sql joining two tables in oracle 11g join three tables in oracle with example join two tables in oracle example join three tables in oracle 11g joining multiple tables in oracle example join between two tables in oracle join between three tables in oracle join two tables in update command oracle how to join two tables in oracle database join two tables in different databases oracle join two tables oracle sql developer left outer join on multiple tables in oracle+example how to join two tables in oracle forms joining two huge tables in oracle how to join multiple tables in oracle how to join multiple tables in oracle sql how to join multiple tables in oracle example how join two tables in oracle inner join multiple tables in oracle inner join two tables in oracle left join multiple tables in oracle join on multiple tables in oracle outer join multiple tables in oracle joining of two tables in oracle joining of three tables in oracle left outer join multiple tables in oracle outer join two tables in oracle oracle join multiple tables performance query to join multiple tables in oracle how to join two tables in oracle reports joining more than two tables in oracle sql inner join multiple tables oracle sql combine two tables oracle sql oracle join multiple tables syntax to join two tables in oracle join two tables in update oracle join two unrelated tables in oracle join with multiple tables in oracle how to join two tables in oracle without common column Please Subscribe: https://www.youtube.com/channel/UC6tweEO2qzGGWXHGFXfe1Ow Facebook: https://www.facebook.com/3iTemplateItSolutions ORACLE 11g: Joining of multiple tables in oracle sql | 3i Template IT Solutions https://youtu.be/oNTm9ZaAwXI
Views: 1168 3i Tutorials For All
MySQL Database Tutorial - 22 - How to Join Tables
 
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Facebook - https://www.facebook.com/TheNewBoston-464114846956315/ GitHub - https://github.com/buckyroberts Google+ - https://plus.google.com/+BuckyRoberts LinkedIn - https://www.linkedin.com/in/buckyroberts reddit - https://www.reddit.com/r/thenewboston/ Support - https://www.patreon.com/thenewboston thenewboston - https://thenewboston.com/ Twitter - https://twitter.com/bucky_roberts
Views: 343596 thenewboston
SSIS: MERGE JOIN FOR INSERT AND UPDATE (UPSERT)
 
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This video demonstrates how to use the Merge Join object in SSIS and what possibilities you have for creating an automated Insert and Update process in one SSIS package Please check my blog azizsharif.blogspot.com for more videos!
TUTORIAL 
CARA MEMBUAT DATABASE MENGGUNAKAN COMMAND PROMPT (CREATE, UPDATE, DELETE, INNER JOIN)
 
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CARA MEMBUAT DATABASE MENGGUNAKAN COMMAND PROMPT (CREATE, UPDATE, DELETE, INNER JOIN)
Views: 373 dwie cahyanie
Introduction to Joins and its types | Need of Joins with example | DBMS
 
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#Joins#SQlDBMS#FreeEducationGATE
Views: 94364 Gate Smashers
Displaying Data from Multiple Tables Using Joins - Oracle SQL Developer
 
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This video covers the following topics: - Joining tables using an equijoin - Performing outer and self-joins - Adding conditions
Views: 3149 MrFphunter
IN VS EXISTS VS JOIN, performance
 
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This video demonstrates the performance effects of using an exists clause instead of an IN clause, also it shows how we can update a simple sub query having an IN clause with an EXISTS or JOIN statement. It also shows that joining would consider the null data, where as an IN clause would neglect null values. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below : union and union all : https://youtu.be/n9FqQOd8liY char and varchar2 : https://youtu.be/039qzwjWf4k replace and translate : https://youtu.be/HKYF77BGzOE procedure and function : https://youtu.be/q3LmOenL120 rank and dense_rank : https://youtu.be/WGSX998hZ9M delete and truncate : https://youtu.be/u76wMm2byXo %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 12650 Kishan Mashru
The SQL UPDATE Statement
 
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This video tutorial covers how to update fields in a SQL database table, using the SQL UPDATE statement. More guides and tutorials: http://www.itgeared.com/.
Views: 34255 itgeared
MSSQL MERGE STATEMENT | UPDATE + INSERT = UPSERT
 
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Views: 148 Viral Videos
Part 12   Can we join two tables without primary foreign key relation
 
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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/2014/09/part-12-can-we-join-two-tables-without.html Can we join two tables without primary foreign key relation Yes, we can join two tables without primary foreign key relation as long as the column values involved in the join can be converted to one type. ID column in Departments table is not the primary Key and DepartmentId column in Employees table is not the foreign key. But we can still join these tables using ID column from Departments table and DepartmentId column from Employees table, as both the columns involved in the join have same data type i.e int. Select Employees.Name as EmployeeName, Departments.Name as DepartmentName from Employees join Departments on Departments.ID = Employees.DepartmentId The obious next question is, if primary foreign key relation is not mandatory for 2 tables to be joined then what is the use of these keys? Primary key enforces uniqueness of values over one or more columns. Since ID is not a primary key in Departments table, 2 or more departments may end up having same ID value, which makes it impossible to distinguish between them based on the ID column value. Foreign key enforces referential integrity. Without foreign key constraint on DepartmentId column in Employees table, it is possible to insert a row into Employees table with a value for DepartmentId column that does not exist in Departments table. The following insert statement, successfully inserts a new Employee into Employees table whose DepartmentId is 100. But we don't have a department with ID = 100 in Departments table. This means this employee row is an orphan row, and the referential integrity is lost as result Insert into Employees values (8, 'Mary', 'Female', 80000, 100) If we have had a foreign key constraint on DepartmentId column in Employees table, the following insert statement would have failed with the following error. Msg 547, Level 16, State 0, Line 1 The INSERT statement conflicted with the FOREIGN KEY constraint. The conflict occurred in database "Sample", table "dbo.Departments", column 'ID'.
Views: 119979 kudvenkat
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: 89495 kudvenkat
Update com Join - Curso de SQL Server Para Iniciantes (Aula 25)
 
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Nesta vídeo aula do curso de SQL Server para iniciantes eu falo como fazer um update com where e explicando que essa é a forma mais difícil de fazer o bendito update. Github https://github.com/Zurubabel/SQLServer/tree/master/Basico Youtube https://www.youtube.com/Zurubabel Facebook https://www.facebook.com/Zurubabel Twitter https://www.twitter.com/ZurubabelBr
Views: 1853 Zurubabel
Oracle SQL Tutorial For Beginners | Oracle SQL Online Training - Session 1
 
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Course : Oracle SQL Online Training Mode of Training : Online Duration : 40 Hours Timings : Flexible Oracle SQL Online Training Demo Registration Link : http://svsoftsolutions.com/demo.aspx Introduction to SQL What is SQL? What Can SQL do? RDBMS SQL Syntax Database Tables SQL Statements Overview of Most Important SQL Commands SELECT UPDATE DELETE INSERT CREATE TABLE ALTER TABLE DROP TABLE CREATE INDEX DROP INDEX SQL SELECT Statement SELECT syntax Demo Database SELECT Column Example SELECT * Example SQL Distinct SELECT DISTINCT Statement SELECT DISTINCT Syntax SELECT DISTINCT Example SQL WHERE Clause WHERE Clause WHERE Clause Example Operators in the WHERE Clause SQL AND & OR Operators AND Operator Example OR Operator Example Combining AND & OR SQL ORDER BY ORDER BY Syntax ORDER BY Example ORDER BY DESC Example ORDER BY Several Column Examples SQL Insert Into INSERT INTO Syntax INSERT INTO Examples Insert Data into Specified Columns SQL UPDATE UPDATE Syntax UPDATE Example Watch out UPDATE statement. SQL DELETE DELETE Syntax DELETE Examples Delete All the Data SQL Aliases SQL Alias Syntax for Columns Alias Example for Table Columns Alias Example for Tables. SQL Joins Different SQL JOINs INNER JOIN LEFT OUTER JOIN RIGHT OUTER JOIN FULL OUTER JOIN SQL UNION UNION Syntax UNION Example UNION ALL Syntax UNION ALL Example SQL Insert Into Select INSERT INTO SELECT Syntax INSERT INTO SELECT Examples SQL Create Table CREATE TABLE Syntax CREATE TABLE Example SQL Constraints CREATE TABLE + CONSTRAINT Syntax NOT NULL Constraint UNIQUE Constraint UNIQUE Constraint on CREATE TABLE UNIQUE Constraint on ALTER TABLE To DROP a UNIQUE Constraint PRIMARY KEY Constraint PRIMARY KEY Constraint on CREATE TABLE PRIMARY KEY Constraint on ALTER TABLE To DROP a PRIMARY KEY Constraint FOREIGN KEY Constraint FOREIGN KEY Constraint on CREATE TABLE FOREIGN KEY Constraint on ALTER TABLE To DROP a FOREIGN KEY Constraint CHECK Constraint CHECK Constraint on CREATE TABLE CHECK Constraint on ALTER TABLE To DROP a CHECK Constraint DEFAULT Constraint on CREATE TABLE DEFAULT Constraint on ALTER TABLE To DROP a DEFAULT Constraint SQL Create Index CREATE INDEX Syntax CREATE UNIQUE INDEX Syntax CREATE INDEX Example SQL DROP Command The DROP INDEX Statement The DROP TABLE Statement The DROP DATABASE Statement The TRUNCATE TABLE Statement SQL ALTER Command The ALTER TABLE Statement ALTER TABLE Example Change Data Type Example DROP COLUMN Example SQL VIEWS CREATE VIEW Statement CREATE VIEW Syntax CREATE VIEW Examples CREATE OR REPLACE VIEW Syntax Dropping a View SQL NULL Values Working with NULL Values IS NULL IS NOT NULL SQL NULL Functions NVL COALESCE For more details visit our website : www.svsoftsolutions.com Or reach us @ USA : +1-845-915-8712 (Toll Free), India : +91-9642373173
Views: 2258 SV Soft Solutions