在查询中的oracle中创建临时表

Question

IN mysql you have something like this:

Select * from    (select * from t1, t2 where t1.c1=t2.c1 ) tbl1 ,tbl2
where tbl1.col1=tbl2.col2;

is there anything in like this in oracle, because when I am trying to do same thing in oracle I am getting this error : invalid identifier "tbl1"."col1".

Answer 1

Try this way:

Select tbl1.col1
from (select c1 as col1 from t1, t2 where t1.c1=t2.c1 ) tbl1 ,tbl2
where tbl1.col1=tbl2.col2;

Here you can find more information.

Answer 2

Try this:

Select tbl1.*, tbl2.* 
from (
  select t1.c1 as col1, t2.* from t1, t2 where t1.c1=t2.c1 
) tbl1 ,tbl2
where tbl1.col1=tbl2.col2;

Because you join 2 tables * doesn't work. Use tbl1.* and tbl2.* instead.

As already suggested by Parado you also have to rename t1.c1 to col1 in your inner select.