Maher, Christopher W writes:
> I was looking for a solution on how to write a constraint into a ' create
> table ' expression that would ensure that one ' TIME ' attribute value
> called arrival_time (declared as TIME) is allways constrained to have a
> value that ensures it is allways after another attribute value called
> departure_time (declared as TIME).
create table test (
arrival_time time,
departure_time time,
check (arrival_time < departure_time)
);
insert into test values ('12:00', '14:30');
INSERT 20651 1
insert into test values ('12:00', '9:45');
ERROR: ExecAppend: rejected due to CHECK constraint $1
--
Peter Eisentraut [EMAIL PROTECTED] http://funkturm.homeip.net/~peter
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