是否有PRODUCT函数，例如Oracle SQL中有SUM函数? [英] is there a PRODUCT function like there is a SUM function in Oracle SQL?

问题描述

我有一个同事在寻找这个，我不记得曾经遇到过类似的事情.

I have a coworker looking for this, and I don't recall ever running into anything like that.

是否有一种合理的技术可以让您模拟它?

Is there a reasonable technique that would let you simulate it?

SELECT PRODUCT(X)
FROM
(
    SELECT 3 X FROM DUAL
    UNION ALL 
    SELECT 5 X FROM DUAL
    UNION ALL
    SELECT 2 X FROM DUAL
)

将产生30

推荐答案

select exp(sum(ln(col)))
  from table;

如果col始终> 0

if col always > 0

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