WITH TEST AS (
  SELECT 30  A FROM DUAL UNION ALL
  SELECT 100   FROM DUAL UNION ALL
  SELECT 20    FROM DUAL UNION ALL
  SELECT 50    FROM DUAL UNION ALL
  SELECT 80    FROM DUAL
)SELECT SUM(A) FROM TEST <= 이것은 합계 내는 방법

여기서 전체 곱을 구하는 방법.