SUSER_SID()

SUSER_SID returns the security identification number (SID) for the specified login name.

Signature

SUSER_SID ( [ 'login' ] [ , Param2 ] )

Parameters

  • Param2 — Applies to: and later versions

Examples

SELECT SUSER_SID();
0x01
SELECT SUSER_SNAME(SUSER_SID('TestComputer\User', 0));
NULL

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 Database
  • Azure SQL Managed Instance
  • Fabric SQL database

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Signature and description adapted from the Microsoft SQL documentation, used under the CC BY 4.0. SQL Server and Azure are trademarks of the Microsoft group of companies. This page is not affiliated with Microsoft.