Hello,
Is it possible to add constraint to second attribute of table only in
the situation when first attribute of table equals specified value ?
I give an example:
CREATE TABLE test (
attrib_1 text,
attrib_2 text
);
INSERT INTO test VALUES ('AAA', 'QQQ');
INSERT INTO test VALUES ('BBB', 'PPP');
So is it possible to add constraint (for instance NOT NULL) to attrib_2
column if attrib_1 = 'AAA'
Regards,
Piotr
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