@@ERROR (Transact-SQL) - SQL Server | Microsoft Learn
Nov 18, 2025 · The following example uses @@ERROR to check for a check constraint violation (error #547) in an UPDATE statement.
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@@ERROR - Transact-SQL Reference Documentation
When Microsoft® SQL Server™ completes the execution of a Transact-SQL statement, @@ERROR is set to 0 if the statement executed successfully. If an error occurs, an error message is returned.