=?iso-8859-1?Q?Domoszlai_L=E1szl=F3?= <dlacko(at)finit(dot)hu> writes:
> So, do you think a DIFFERENCE or EXCEPT SYMMETRIC clause will be reasonable
> feauture for postgresql?
I doubt it; haven't heard a request for it before, and AFAICS there's no
such thing in the SQL spec...
regards, tom lane