oracle SQL上的条件SUM

本文介绍了oracle SQL上的条件SUM的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我通过以下方式获取数据:

I have the data in the follow way:

ITEM LOCATION UNIT RETAIL QUANTITY 100 KS 10 -10 200 KS 20 30

我想要正数量的总和(数量> 0)和负数量的总和(数量< 0).

I want the sum of positive quantities (quantity > 0) and sum of negative quantities (quantity < 0).

如何根据条件获取那些列的总和?

How do I get those column sum based on condition?

推荐答案

您可以使用SUM(CASE ... ):

SELECT item, location, SUM(CASE WHEN quantity > 0 THEN quantity ELSE 0 END) AS positive_sum, SUM(CASE WHEN quantity < 0 THEN quantity ELSE 0 END) AS negative_sum FROM your_table GROUP BY item, location;

LiveDemo

LiveDemo