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  • 增加复合索引优化SQL的简单过程

    byfree 发表于 2008-04-29 17:36:45

    待优化SQL:select t2.emperor,t1.* from t1,t2 where t1.countryid=t2.id and t1.CountryId=1010 and t1.DistrictId=1 and playerId<>100 T1表上的索引:SQL> select index_name,column_name from user_...

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