SUSER_ID()

Returns the login identification number of the user.

Signature

SUSER_ID ( [ 'login' ] )

Examples

SELECT SUSER_ID('sa');
1

Run against SQL Server 16.0.4265.3 on 2026-09-13. This is the output we got, not the documentation’s.

Available on

  • SQL Server 2017 and later
  • Azure SQL Managed Instance

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