Hi Would you mind to tell me how the DIVIDEBY operator could be defined (the way Codd E.F [1] or Date C.J [2] define it) in PostgreSQL ? Using PostgreSQL 7.1.2 Thanks in advance. 1 Codd E.F. Relational Completeness of Data Base Sublanguages 2 Date C.J. An Introduction to Database Systmes 6th ed. -- Vladimir Zolotych [EMAIL PROTECTED] ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly