SQL> select * from emp;
EMP_ID DEPT_ID EMP_NAME SALARY ------ ------ ---------- ---------- E01 D01 なまえ1 150 E02 D02 なまえ2 300 E03 D03 なまえ3 300 E04 D02 なまえ4 400 E05 D03 なまえ5 500 E06 D03 なまえ6
SQL> select 2 var_pop( salary ) 3 from emp;
VAR_POP(SALARY) --------------- 13600
SQL> select 2 dept_id, var_pop( salary ) 3 from emp 4 group by dept_id;
DEPT_ID VAR_POP(SALARY) ----- --------------- D01 0 D02 2500 D03 10000