MySQL Order By 用法

ORDER BY uid ASC

按照uid正序查询数据，也就是按照uid从小到大排列

ORDER BY uid DESC

按照uid逆序查询数据，也就是按照uid从大到小排列

 

例子：select * from test where uid=1 order by id desc limit 1; 逆序查询，查最后一个uid=1的行

   select * from test where uid=1 order by id asc limit 1; 正序查询，查uid=1的第一行