2007-09-21 17:13 | pinty

回复楼上，根据LEVEL的数决定输出“-”的个数，看下面的例子

SELECT LEVEL, LPAD(' ',2*(LEVEL - 1)) || lname "EMPLOYEE",

emp_id, manager_emp_id

FROM employee

START WITH emp_id = 7839

CONNECT BY NOCYCLE PRIOR emp_id = manager_emp_id;

LEVEL EMPLOYEE EMP_ID MANAGER_EMP_ID

---------- -------------------- ---------- --------------

1 KING 7839 7654

2 JONES 7566 7839

3 SCOTT 7788 7566

4 ADAMS 7876 7788

3 FORD 7902 7566

4 SMITH 7369 7902

2 BLAKE 7698 7839

3 ALLEN 7499 7698

3 WARD 7521 7698

3 MARTIN 7654 7698

3 TURNER 7844 7698

3 JAMES 7900 7698

2 CLARK 7782 7839

3 MILLER 7934 7782  回复  更多评论