mysql性能優化之explain

轉自如下兩篇mysql http://blog.csdn.net/zhuxineli/article/details/14455029 http://database.51cto.com/art/201108/284783.htmweb 1.使用explain語句去查看分析結果sql 如explain select * from test1 where id=1;會出現：id selecttype

>>阅读原文<<