Q12. What is RAISERROR()? Where do you use this?

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The name itself RAISERROR is saying that, we are raising an error. Mostly we use RAISERROR with exceptional handling of stored procedures, SQL scripts. In SQL Server we have ERROR_MESSAGE() function to display error messages. But sometimes it might not give meaningful error message.

So by using RAISERROR function, we can overwrite the error message in a meaningful way.

Ex:

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BEGIN TRY

DECLARE @RaiserrorDemo INT

SET @RaiserrorDemo = 8/0

END TRY

BEGIN CATCH

RAISERROR (‘Divided by zero exception. We can not divide a number with zero.’, 16, 1)

— 16 — Error Severity

—  1 — Error state

END CATCH

GO

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Error Raised by the above ex:

Msg 50000, Level 16, State 1, Line 9

Divided by zero exception. We can not divide a number with zero.

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