Different selection in a single query according to an ID

Question

Hi
I'm looking for a way to perform different selections in a single query according to a specific value:
Here is the first selection:
  select g.*,gf.*,gs.*         
  FROM graphs g
  LEFT JOIN graph_frames gf on g.graph_id = gf.graph_id
  LEFT JOIN graph_sets gs on gf.frame_id = gs.frame_id
  WHERE g.graph_id = :IDHere is the second selection:
  SELECT gg.graph_id, gg.graph_name
  FROM generic_graphs gg
  INNER JOIN generic_graph_frames ggf on gg.graph_id = ggf.graph_id
  INNER JOIN generic_graph_sets ggs on ggf.frame_id = ggs.frame_id
  WHERE gg.graph_id = :IDNow, the ID cannot be in both the tables and I want to perform that in a single query, UNION cannot be applied since the tables are different.
Any ideas?
Edited by: BluShadow on 14-Sep-2011 09:09
added {noformat}{noformat} tags.  Please read {message:id=9360002} and learn to do this yourself.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Answer 1

Example of consolidating the columns...
SQL> ed
Wrote file afiedt.buf
  1  with t as (select &id as id from dual)
  2  select e.empno, e.ename, e.job, e.mgr, d.deptno, d.dname, d.loc
  3  from   (select * from emp cross join t where empno = t.id) e
  4         full outer join
  5         (select * from dept cross join t where deptno = t.id) d
  6*        on (1=1)
SQL> /
Enter value for id: 7521
old   1: with t as (select &id as id from dual)
new   1: with t as (select 7521 as id from dual)
     EMPNO ENAME      JOB              MGR     DEPTNO DNAME          LOC
      7521 WARD       SALESMAN        7698
SQL> /
Enter value for id: 10
old   1: with t as (select &id as id from dual)
new   1: with t as (select 10 as id from dual)
     EMPNO ENAME      JOB              MGR     DEPTNO DNAME          LOC
                                                   10 ACCOUNTING     NEW YORK
SQL>Though, this would be considered poor design because you are trying to query two disperate things, so they should be treated differently. i.e. in my example, I should already know if I'm querying an employee or a department beforehand.