Mysql查看执行计划

explain select …………….（在相应的select前面加explain便可）html http://www.cnblogs.com/ruiannan/p/7707534.htmlui   https://www.cnblogs.com/xu-xiang/p/5833349.html.net   http://www.javashuo.com/article/p-dmcgrjcl-bx

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