Add Group by for the Query..

Question

While executing the following query error has came
ORA-22818: subquery expressions not allowed here
22818. 00000 - "subquery expressions not allowed here"
*Cause:    An attempt was made to use a subquery expression where these
are not supported.
             SELECT TO_CHAR(nvl(a.date2, (SELECT MAX(aud.date1)
                              FROM emp aud
                              WHERE aud.deptno=a.deptno
                              )), 'YYYY') year1
             ,a.name cn1
             ,SUM(a.amt) amt1
         FROM dept a
             WHERE a.name = 'SCOTT'
             AND nvl(a.date2, (SELECT MAX(aud.date1)
                              FROM emp aud
                              WHERE aud.deptno=a.deptno)) >= TO_DATE('01' || '01/2011', 'dd/mm/yyyy')
           Group By TO_CHAR(nvl(a.date2, (SELECT MAX(aud.date1)
                              FROM emp aud
                              WHERE aud.deptno=a.deptno
                              )), 'YYYY')
                ,a.name
                        TO_CHAR(nvl(a.date2, (SELECT MAX(aud.date1)
                              FROM emp aud
                              WHERE aud.deptno=a.deptno
                              )), 'YYYY')
                ,a.name
            ORDER BY TO_CHAR(nvl(a.date2, (SELECT MAX(aud.date1)
                              FROM emp aud
                              WHERE aud.deptno=a.deptno
                              )), 'YYYY')
                ,a.name
                        TO_CHAR(nvl(a.date2, (SELECT MAX(aud.date1)
                              FROM emp aud
                              WHERE aud.deptno=a.deptno
                              )), 'YYYY')
                ,a.name;                    Anybody plz...
Edited by: BluShadow on 04-Jul-2011 12:00
added {noformat}{noformat} tags.  Please learn to do this yourself {message:id=9360002}                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

Answer 1

hi,
dow you want this?
not tested
SELECT yearmax, deptname, SUM(amt1) summ
FROM
(SELECT a.name deptname, a.amt amt1, a.date2,
                         TO_CHAR(nvl(a.date2,(SELECT MAX(aud.date1)
                                FROM emp aud
                              WHERE aud.deptno=a.deptno)),'YYYY') yearmax
   FROM dept a)
WHERE deptname = 'SCOTT'
  AND yearmax >= TO_DATE('01' || '01/2011', 'dd/mm/yyyy')
Group By yearmax,deptname
            ORDER BY yearmax,deptname;