Hi list,
I have two question concerning check constraints:
1) Is it possible to refer to a column in a different table, ie
entering a value in mytable.x should only be allowed if mytable2.y=1 for
example? I know that it is possible to use triggers to do that, but I
think adding a simple check constraint might be simpler.
2) Is it possible to issue custom error messages in case a constraint
is violated?
Thanks!
Christian Rengstl M.A.
Klinik und Poliklinik für Innere Medizin II
Kardiologie - Forschung
Universitätsklinikum Regensburg
B3 1.388
Franz-Josef-Strauss-Allee 11
93053 Regensburg
Tel.: +49-941-944-7230
