=?iso-8859-1?q?Mart=EDn=20Marqu=E9s?= <martin(at)bugs(dot)unl(dot)edu(dot)ar> writes:
> Which is the best approach to put in a check constraint
> col <> something
> col != something
> ?
There's really no difference ... although <> is the
SQL-standard-approved spelling, if that matters to you.
regards, tom lane