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rohaandba
Starting Member
33 Posts |
 Posted - 2012-04-17 : 16:48:47
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| I have a table with 3 columns A int NullB int NullC int Not Null -- Cloumn 'C' can have only 2 values 150 & 151I need to create a Check Constraint with the conditions if value in Column 'C' is 150 then Column 'A' should have a value for sure (ie IS Not Null)if value in Column 'C' is 151 then Column 'B' should have a value for sure (ie IS Not Null)Can any one help me how to create this perticular check constraint, and if needed a function also. |
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robvolk
Most Valuable Yak
15732 Posts |
Posted - 2012-04-17 : 17:06:13
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| ALTER TABLE myTable ADD CONSTRAINT CK_Values CHECK ((C=150 AND A IS NOT NULL) OR (C=151 AND B IS NOT NULL)) |
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rohaandba
Starting Member
33 Posts |
Posted - 2012-04-17 : 17:41:02
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| Thanks you very much,Is there any way if the Column 'C' is allowed to have other values than 150 & 151In That perticular senario both columns A & B can accept nulls.How could I change this check constraint. |
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robvolk
Most Valuable Yak
15732 Posts |
Posted - 2012-04-17 : 17:48:21
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| ALTER TABLE myTable ADD CONSTRAINT CK_Values CHECK (C NOT IN (150,151) OR (C=150 AND A IS NOT NULL) OR (C=151 AND B IS NOT NULL)) |
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Check Constraint