Re: Another Terminlogy Question

Posted in 1997

Jonathan Leffler — 23 Oct 1997 13:08:10 -0400 — source: Informix-list mailing list archive (1991-1998)

On Thu, 23 Oct 1997, james.woodger wrote: > What does Informix call the constraints that let you define a hard-coded > list of values that a column must have (e.g. "Y", "N"). CHECK constraints, because they are activated using the notation: CREATE TABLE ... ( SomeCol ... CHECK (SomeCol IN ("Y", "N")) CONSTRAINT c1_xxxx ); and appropriate variants on this notation. > Other databases variously call these "rules", "check constraints", etc. Yours, Jonathan Leffler (johnl@informix.com) #include <witticism.h>