SQL Server provides built-in system-defined exceptions that help handle various errors and exceptions that can occur during database operations. These exceptions are predefined and can be caught and handled using TRY...CATCH blocks.
Example
BEGIN TRY
-- Code that may cause an error
END TRY
BEGIN CATCH
-- Handle the error here
END CATCH
User Defined Exception Handling
SQL Server allows users to define custom exceptions using RAISEERROR or by creating custom error messages with sp_addmessage. These user-defined exceptions can be raised and caught within stored procedures or T-SQL code.
Example
BEGIN TRY
-- Code that may raise a user-defined exception
IF (SomeCondition)
RAISEERROR('Custom Error Message', 16, 1)
END TRY
BEGIN CATCH
-- Handle the user-defined exception here
END CATCH
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