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Asked: 2026-05-30T22:15:59+00:00

Is it possible to express a conditional validation on an insert or update to

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Is it possible to express a conditional validation on an insert or update to a table (SQL Server 2008 R2) that says column A cannot be null if column B is equal to 12,13 or 14.

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  1. Editorial Team

    You can implement this with a table level CHECK constraint:

    ALTER TABLE YourTable 
ADD CONSTRAINT CK_YourCheck 
CHECK(ColumnA IS NOT NULL OR ColumnB NOT IN (12, 13, 14))
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