I suppose you could put a check constraint that forces a single value on a column with a unique index? Or an insert trigger that always inserts the same value into a unique field.
Out of curiosity, why do you need to do this? Dmitri -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of KÖPFERL Robert Sent: Tuesday, January 11, 2005 9:46 AM Cc: pgsql-sql@postgresql.org Subject: [SQL] Single row tables Importance: High Hi, with what constraint or how can I ensure that one of my tables has exact one record or 0..1 records? ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings ---------------------------(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
