From: Martijn Tonies Date: October 13 2004 4:11pm Subject: Re: InnoDB and foreign keys List-Archive: http://lists.mysql.com/mysql/174110 Message-Id: <004701c4b13f$5d9a8440$0a02a8c0@martijn> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit > does anybody know if Foreign keys increase the performance of select querys? > example. > DB1 has only INNODB tables. > DB2 has the same structure as DB1 with all possible foreign keys. > > is the same query faster on DB1 or DB2? Why should it increase performance? With regards, Martijn Tonies Database Workbench - developer tool for InterBase, Firebird, MySQL & MS SQL Server. Upscene Productions http://www.upscene.com