Oracle join运算符

Question

如何重写这个:

select tab1.id, tab2.id, tab3.id 
from tab1, tab2, tab3 
where tab1.col1 = tab2.col1(+) and tab2.col2 = tab3.col2(+);

使用OUTER JOIN语法？

Answer 1

select tab1.id, tab2.id, tab3.id 
from tab1
left outer join tab2 on tab1.col1 = tab2.col1
left outer join tab3 on tab2.col2 = tab3.col2;