sql constraint check value in list
ALTER TABLE <table>
ADD CONSTRAINT chk_val CHECK (col in ('yes','no','maybe'))
sql constraint check value in list
ALTER TABLE <table>
ADD CONSTRAINT chk_val CHECK (col in ('yes','no','maybe'))
check constraint in sql
#Add Check
ALTER TABLE Persons
ADD CONSTRAINT CHK_PersonAge CHECK (Age>=18 AND City='Sandnes');
#Drop Check
ALTER TABLE Persons
DROP CHECK CHK_PersonAge;
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