mysql sql limit where having order

SQL语句执行顺序及MySQL中limit的用法 

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 分类： MySql2013-09-02 09:1315人阅读评论(0)收藏举报



 写的顺序：select ... from... where.... group by... having... order by..

 执行顺序：from... where...group by... having.... select ... order by...

 



MYSQL中：

 



写的顺序：select ... from... where.... group by... having... order by.. limit [offset,] (rows)

 执行顺序：from... where...group by... having.... select ... order by... limit

 



limit限制查询的结果序号 

 limit off, n: 从off偏移取n个数据

 limit n: 取前n个数据，相当于limit 0, n