基础-SQL-DQL-执行顺序
select 是在where之后执行的，select也是在order by之前执行
DQL语句的执行顺序为： from ... where ... group by ... having ... select ... order by ... limit ...
select 是在where之后执行的，select也是在order by之前执行
DQL语句的执行顺序为： from ... where ... group by ... having ... select ... order by ... limit ...