可能重复:
Left join and Left outer join in SQL Server左外连接与左连接相同吗?
根据我的研究,下面的语句是正确的
A) Join is the same as inner join.
B) Left outer join is the same as left join
C) Right outer join is the same as right join
D) There is no such thing as left inner join and right inner join
首先,我认为你应该放一个'家庭作业'标签。 – 2012-03-27 13:01:11