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简单索引和insert、replace语句-Spider-Man
source link: http://blog.51cto.com/12730062/2074251
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1、建立索引mysql> create index agei on student(age desc); //agei是索引名，desc是降序mysql> create index agei on student(age asc); //asc是默认，升序2、删除索引mysql> alter table student drop index agei;
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