On Mon, Oct 10, 2005 at 04:44:54PM +0200, David Pradier wrote: > Hi everybody, > > i'd like to know if it is better to use a primary key made of a couple > columns, than to use a constraint UNIQUE() on this couple columns, > regarding the sake of postgresql.
In PostgreSQL, both primary keys and UNIQUE constraints are implemented via UNIQUE indexes, ergo there is no difference... Have a nice day, -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a > tool for doing 5% of the work and then sitting around waiting for someone > else to do the other 95% so you can sue them.
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