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Composite Key/Compound Key in SQL Server

Composite Key/Compound Key in SQL Server

A composite key is a combination of two or more columns in a table that is used to uniquely identify each record in table. When the columns are combined uniqueness but when it taken individually it doesn't guarantee uniqueness.

Change database Schema in sql server

Change database Schema in sql server

You can run the following, which will generate a set of ALTER SCHEMA statements for Table and procedure:

Primary Key in SQL Server

Primary Key in SQL Server

Primary key is used to uniquely identify the records in a SQL Table. Here we can say, primary key is a value of a column that value is unique in the table. Primary key don't accept any null value. Primary Key is also play an important role to create relationship between two tables.

Cursors in SQL Server

Cursors in SQL Server

The main functionality of cursor is to retrieve data one row at a time. Means cursor provide a functionality of looping in SQL Server.

Unique Key in SQL Server

Unique Key in SQL Server

Unique Key is used to uniquely identify the row in SQL Table. In Unique Key column only one value can be NULL. We can create more than one Unique Key.

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