标签：sel group by from 语句 order by distinct nbsp 执行顺序 HERE
一、sql执行顺序
(1)from
(3) join
(2) on
(4) where
(5)group by(开始使用select中的别名，后面的语句中都可以使用)
(6) avg,sum....
(7)having
(8) select
(9) distinct
(10) order by
标签：sel group by from 语句 order by distinct nbsp 执行顺序 HERE
原文地址：https://www.cnblogs.com/sunpengblog/p/11299159.html
