look at http://www.xaprb.com/blog/2006/07/04/how-to-exploit-mysql-index-optimizations/
prior to MySQL 5.5, MYISAM is default engine. InnoDB becomes default from 5.5.
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look at http://www.xaprb.com/blog/2006/07/04/how-to-exploit-mysql-index-optimizations/
prior to MySQL 5.5, MYISAM is default engine. InnoDB becomes default from 5.5.
相关文章：