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IDENTITY

A column property, written IDENTITY(seed, increment), that gives each new row the next number in a rising sequence. SCOPE_IDENTITY reports the latest value created in the current scope, and a rolled-back transaction still uses up the numbers it took.

Read more: Microsoft Learn

In the Ultra Transcenders books

DP-800

Each book explains IDENTITY in context, with comparison tables and the common traps.

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See IDENTITY in the full glossary