oracle 空置排在最后显示

nulls last 

 

 

 

1 select * from emp order by comm

 

 

1 select * from emp order by comm desc

 

 

select *  from emp order by comm  nulls last

posted @ 2014-12-23 14:51  liuwt365  阅读(242)  评论(0)    收藏  举报