Valid Sql Syntax....

Question

Hi ,
Is the following sql statement format valid...????
select col1 , col2 , col3 , (select col5 , col6
                                      from x
                                      where col5='value') s
where col1=s.col5when i execute a query having the above format , i get the error :
ORA-00913:too many columns
When i execute individually each sql statement , i get one row only with a matching data value for one column as the above general sql format displays....
How should i write the above sql statement in order to be valid..????
Thanks , a lot
Simon

Answer 1

Use two subSELECTs like here.
If you put the same where clause the fetched row will be the same and you would get what you want.
Processing ...
select dummy,dummy
from dual
Query finished, retrieving results...
   DUMMY     DUMMY_1 
X          X         
1 row(s) retrieved
Processing ...
select (
          select dummy,dummy
          from dual
from dual;
ORA-00913: too many values
Processing ...
select (
          select dummy
          from dual
          select dummy
          from dual
from dual
Query finished, retrieving results...
(SELECTDUMMYFROMDUAL) (SELECTDUMMYFROMDUAL)_1
X                     X                      
1 row(s) retrievedBye Alessandro
Message was edited by:
alessandro.miami