Understanding Identity Columns in SQL Server Before we proceed to reset identity column values, let us first define identity columns in SQL Server. When a new record is added to a SQL Server table, the identity field is automatically populated with a unique integer value. To assure row uniqueness, the identification column is frequently utilized as the table’s primary key.

Install Required Software

• Microsoft® SQL Server® 2019 Express from here

Reseeding an Identity Column

Reseeding an identity column implies changing the value of the identity column to a certain integer. Reseeding an identity column is handy when you want to start the values of the identity column at a specified number or when you want to reset the values of the identity column after deleting rows from the database.

The DBCC CHECKIDENT command can be used to reseed an identity column in SQL Server. The command’s syntax is as follows:

DBCC CHECKIDENT ('TableName', RESEED, New_Value)

DBCC CHECKIDENT ('Customers', RESEED, 201)
 

‘Customers’ is the name of the table whose identification column you wish to reseed in this case. ‘NewValue’ is the value to which the identity column should be reset. For instance, if you want to reset the identification column of the ‘Customers’ database to 201, execute the following command:

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Automatically Resetting Identity Column Values

If you want to automatically reset the identity column values, construct a stored procedure that utilizes the DBCC CHECKIDENT command to reseed the identity column. The stored procedure can then be scheduled to run at a given time or interval using SQL Server Agent.

Conclusion
We explored how to reset identity column values in SQL Server in this article. We discussed how to reseed an identity column, insert rows with specified identity column values, and automatically reset identity column values. You may quickly reset identity column values in SQL Server by following these instructions.

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