sql server 2005 :how to put not null constraint on a column depending upon value in other column?
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05-07-2019 - |
Question
in a table two of columns are billable(bit),billabledate(datetime).i want billable date to be not null if billable is not null.
Solution
Add a check constraint:
CHECK (billable is not null and billabledate is not null) OR (billable is null)
OTHER TIPS
You need a Check Constraint
ALTER TABLE dbo.Table WITH NOCHECK
ADD CONSTRAINT CK_Table_BusinessRule
CHECK (Billable IS NOT NULL AND BillableDate IS NOT NULL)
http://msdn.microsoft.com/en-us/library/ms179491(SQL.90).aspx
I'd try adding a trigger to the table, on after insert and after update, to enforce that constraint. Check the billable value, and block insert/update in case it is not null and the billabledate is null.
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