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Editorial Team
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Asked: 2026-05-14T20:16:50+00:00

I have a SQL Server database with an Apartment table (which has columns FloorNum

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I have a SQL Server database with an Apartment table (which has columns FloorNum and BuildingID) and an ApartmentBuilding table (with column NumFloors). Is there any way to set up a constraint (using the SQL Server UI) to check that Apartment.FloorNum is greater than ApartmentBuilding.NumFloors?

I tried this:

FloorNum > ApartmentBuilding.NumFloors

but now I realize that I somehow have to join the columns on the BuildingID, but I have no idea how to do that within a constraint.

Thanks for your help!

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1 Answer

  1. Editorial Team

    You can’t do this with a CHECK CONSTRAINT since it requires data from another table. You would handle this with an INSERT/UPDATE trigger.

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