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IN、EXISTS的相关子查询用INNER JOIN 代替--性能优化
如果保证子查询没有重复 ,IN、EXISTS的相关子查询可以用INNER JOIN 代替。比如:
IN、EXISTS的相关子查询用INNER JOIN 代替--sql2000性能优化
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原文地址:https://www.cnblogs.com/firstdream/p/7327077.html
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