nysql索引

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参考文献来自https://www.cnblogs.com/morewindows0/p/9223671.html

下面为自己做的测试，记下来以防忘记

EXPLAIN select * from suoyin_test where c2=‘a1‘

EXPLAIN select * from suoyin_test where c2=‘a1‘ and c1=‘a1‘

EXPLAIN select * from suoyin_test where c1 like ‘a1%‘ and c2=‘a1‘ 

EXPLAIN select * from suoyin_test where c1 like ‘a1%‘ and c3=‘a1‘ 

EXPLAIN select * from suoyin_test where c1=‘a1%‘ and c2=‘a1‘ ORDER BY c3

EXPLAIN select * from suoyin_test where c1=‘a1%‘ and c3=‘a1‘ ORDER BY c2

nysql索引

标签：分享图片   自己   ima   索引   log   ext   span   win   www.   

原文地址：https://www.cnblogs.com/bzdfn/p/9955194.html