Oracle 连表查询

内连接： select * 

from t1,t2

where t1.f1=t2.f1

左外连接：select *

from t1,t2

where t1.f1=t2.f1(+)

右外连接：select *

from t1,t2

where t1.f1(+)=t2.f1

全外连接：select *

from t1

full outer join t2

on t1.f1=t2.f1