sql--执行顺序

写的顺序：select ... from... where.... group by... having... order by.. limit [offset,] (rows)   从0开始取几条数据
执行顺序：from... where...group by... having.... select ... order by... limit

sql--执行顺序

标签：顺序   order by   row   class   group by   group   limit   --   pre