How to write group by ???

Question

Hi all,
I have problem with GROUP BY clause.
My query is
select case .........end shift, t.*
from table1
where ....
gruop by case.....end
Its throws me an error. But if the remove the column "t.*" then if i write the satement
select case .........end shift
from table1
where ....
gruop by case.....end
its fetches me the output.
But I want that column also what I should do, how should i group. Please help me.
Thanks in advance.
Regards
Uraja

Answer 1

The merits of your case statement aside (I agree with all of William's comments), you just need to GROUP BY you case statement as you use it in the SELECT list.
SQL> l
  1  SELECT CASE WHEN crea_ts BETWEEN TO_DATE('01-jan-2000','dd-mon-yyyy') and
  2                                   TO_DATE('31-dec-2002','dd-mon-yyyy') THEN 'Oldest'
  3              WHEN crea_ts BETWEEN TO_DATE('01-jan-2003','dd-mon-yyyy') and
  4                                   TO_DATE('31-dec-2005','dd-mon-yyyy') THEN 'Old'
  5              ELSE 'New' END status, count(*)
  6  FROM t
  7  GROUP BY CASE WHEN crea_ts BETWEEN TO_DATE('01-jan-2000','dd-mon-yyyy') and
  8                            TO_DATE('31-dec-2002','dd-mon-yyyy') THEN 'Oldest'
  9       WHEN crea_ts BETWEEN TO_DATE('01-jan-2003','dd-mon-yyyy') and
10                            TO_DATE('31-dec-2005','dd-mon-yyyy') THEN 'Old' ELSE
11       ELSE 'New' END;
STATUS   COUNT(*)
New         20171
Old          6053
Oldest       5623TTFn
Jhon