SrcName (10/3/2013)
if you define constraint then you don't have situation for update,because there will be no rows with impaired restriction, unless you disable constraint.
???
I am curious how you would meet the requirements of the OP using a constraint.
Here is the sample table with some data.
CREATE TABLE usTab1
(
Col1 INT IDENTITY(1,1) NOT NULL PRIMARY KEY,
Col2 Tinyint DEFAULT (0) NOT NULL,
Col3 NVARCHAR(30) NOT NULL
)
insert usTab1
select 0, 'Allows change' union all
select 1, 'Can''t change'
select * from usTab1
How can you write a constraint that won't allow an update to Col3 when the value of Col2 = 0?
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