From: Chris W Date: January 29 2010 7:57pm Subject: Re: 50 things to know before migrating from Oracle to MySQL List-Archive: http://lists.mysql.com/mysql/220481 Message-Id: <4B633D8E.3090602@cox.net> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit fsb wrote: > as a relatively unsophisticated dbms user (just dynamic web site back end), > i thought it was very interesting to see the kinds of things oracle users do > that i'd never have imagined. > > more than 61 joins in a query?! man, those guys are hardcore. > > Hardcore stupid if you ask me. I suppose it is "possible" to have a valid reason (can't imagine what it might be) for using more than 61 joins. But I would be willing to bet that 99.99% of the time if you get even close to that many joins you have a very poorly designed database. I would also bet that 80% of the people who are actually writing queries with that many joins don't have a solid grasp of the fundamental principles of relational database design. Chris W