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  1. www.w3schools.com › SQL › sql_ref_foreign_keySQL FOREIGN KEY Keyword - W3Schools

    The FOREIGN KEY constraint is a key used to link two tables together. A FOREIGN KEY is a field (or collection of fields) in one table that refers to the PRIMARY KEY in another table. The following SQL creates a FOREIGN KEY on the "PersonID" column when the "Orders" table is created:

  2. www.w3schools.com › sql › sql_foreignkeySQL FOREIGN KEY Constraint - W3Schools

    The FOREIGN KEY constraint is used to prevent actions that would destroy links between tables. A FOREIGN KEY is a field (or collection of fields) in one table, that refers to the PRIMARY KEY in another table.

  3. stackoverflow.com › questions › 48772How do I create a foreign key in SQL Server? - Stack Overflow

    To Create a foreign key on any table . ALTER TABLE [SCHEMA].[TABLENAME] ADD FOREIGN KEY (COLUMNNAME) REFERENCES [TABLENAME](COLUMNNAME) EXAMPLE ALTER TABLE [dbo].[UserMaster] ADD FOREIGN KEY (City_Id) REFERENCES [dbo].[CityMaster](City_Id)

  4. learn.microsoft.com › en-us › sqlCreate foreign key relationships - SQL Server | Microsoft Learn

    22 lip 2024 · This article describes how to create foreign key relationships in SQL Server by using SQL Server Management Studio or Transact-SQL. You create a relationship between two tables when you want to associate rows of one table with rows of another.

  5. learnsql.com › cookbook › how-to-create-a-table-with-a-foreign-key-in-sqlHow to Create a Table with a Foreign Key in SQL

    Learn how to create a foreign key for a table in SQL using different methods and examples. A foreign key is a column that references another table's primary key and enforces data integrity.

  6. www.sqlshack.com › sql-foreign-keySQL Foreign key - SQL Shack

    5 kwi 2019 · Learn how to create a SQL foreign key constraint with different options and rules, such as cascade, set null, set default, and no action. Also, see how to enable, disable, and check foreign key constraints in SQL server database.

  7. www.mssqltips.com › sqlservertip › 4790How to create a SQL Server foreign key

    In this tip we look at how to create a SQL Server foreign key using both T-SQL and the SSMS GUI.

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