$ oerr ora 1417
01417, 00000, "a table may be outer joined to at most one other table"
// *Cause:  a.b (+) = b.b and a.c (+) = c.c is not allowed
// *Action: Check that this is really what you want, then join b and c first
//          in a view.
$

SQL> SELECT   d.dname
  2  ,        COUNT(e.ename)
  3  FROM     emp  e
  4  ,        dept d
  5  WHERE    d.deptno = e.deptno (+)
  6  AND      e.ename > CHR(32)
  7  GROUP BY d.dname
  8  /

DNAME          COUNT(E.ENAME)
-------------- --------------
ACCOUNTING                  3
OPERATIONS                  0
RESEARCH                    5
SALES                       6

DNAME          COUNT(E.ENAME)
-------------- --------------
ACCOUNTING                  3
RESEARCH                    5
SALES                       6

SQL> SELECT   d.dname
  2  ,        COUNT(e.ename)
  3  FROM     emp  e
  4  ,        dept d
  5  WHERE    d.deptno = e.deptno (+)
  6  AND      e.ename <font color=red><b>(+)</b></font> > CHR(32)
  7  GROUP BY d.dname
  8  /
  
DNAME          COUNT(E.ENAME)
-------------- --------------
ACCOUNTING                  3
OPERATIONS                  0
RESEARCH                    5
SALES                       6
  
SQL>