Oracle实现连乘和求和

---创建测试表

CREATE TABLE LUCKYTEST(
    PARENT_ID NUMBER,
    PART_ID NUMBER,
    QUALITY NUMBER);

INSERT INTO TEST LUCKYTEST(1,1,2);
INSERT INTO TEST LUCKYTEST(1,2,3);
INSERT INTO TEST LUCKYTEST(1,3,2);
INSERT INTO TEST LUCKYTEST(1,4,5);
INSERT INTO TEST LUCKYTEST(2,2,3);
INSERT INTO TEST LUCKYTEST(2,3,5);
INSERT INTO TEST LUCKYTEST(2,4,7);

  一、实现累加

SELECT SUM(QUALITY) FROM LUCKYTEST

 二、实现累积

SELECT EXP(SUM(LN(T.QUALITY))) FROM LUCKYTEST T