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SQL SERVER – DBCC command to RESEED Table Identity Value – Reset Table Identity

Pinal Dave
SQL, SQL Performance, SQL Server, SQL Tips and Tricks
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DBCC CHECKIDENT can reseed (reset) the identity value of the table. For example, YourTable has 25 rows with 25 as last identity. If we want next record to have identity as 35 we need to run following T SQL script in Query Analyzer.

DBCC CHECKIDENT (yourtable, reseed, 34)

If table has to start with an identity of 1 with the next insert then the table should be reseeded with the identity to 0. If identity seed is set below values that currently are in table, it will violate the uniqueness constraint as soon as the values start to duplicate and will generate error.

Reference : Pinal Dave (https://darkslategrey-bat-805937.hostingersite.com)

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Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 22 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.

Pinal has authored 14 SQL Server database books and 92 Pluralsight courses. To freely share his knowledge and help others build their expertise, Pinal has also written more than 5,800 database tech articles on his blog at https://darkslategrey-bat-805937.hostingersite.com.

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