Oracle has a rowid column automatically built into every row. Most vendors suggest using primary keys for all tables instead of a "rowid". -----Original Message----- From: Dirk Lutzebaeck [SMTP:[EMAIL PROTECTED]] Sent: Monday, August 30, 1999 2:15 AM To: Jay Bloodworth Cc: [EMAIL PROTECTED] Subject: Re: [GENERAL] OID vs SERIAL Does anyone know if the big boys like Oracle, Informix, Sybase, DB2 and so on support something like OIDs? This would be an interesting portability issue. Dirk ************ ************