Re: [SQL ] left join(?)

楼主: cutekid (可爱小孩子)   2014-06-24 15:52:32
select a,b
from (
select table1.id,table2.d as a
作者: BigLoser (大鲁蛇)   2014-06-24 17:04:00
请问一下,一定得用作种作法吗? 似乎效率不好?
楼主: cutekid (可爱小孩子)   2014-06-25 08:39:00
#1JgI7Tby 中 scpisces 的作法比较好

Links booklink

Contact Us: admin [ a t ] ucptt.com