Hi everyone, i hope (and i'm sure) somebody can answer my question: if i have a master table and several "child" tables, do the child tables inherit the unique constraint(s) defined for the master table or do i have to define the same constraints for the same fields in all the child tables? 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