如何在 SQL 中用小数表示百分比 [重复]答案

【问题标题】：How to express percentage with decimal in SQL [duplicate]如何在 SQL 中用小数表示百分比 [重复]
【发布时间】：2021-08-15 18:05:01
【问题描述】：

SELECT RecruitmentSource,  COUNT(RecruitmentSource) AS NumberOfHired, COUNT(RecruitmentSource)/SUM(COUNT(RecruitmentSource)) OVER () AS PercentageHired
FROM HRDataset_v14$
GROUP BY RecruitmentSource

我期望的招聘百分比如下链接

仅供参考，雇用的总人数是 311，所以我希望这个数字会像

1. 0.0739
2. 0.0932
3. 0.0997
.
.
.
9. 0.0418

请帮我解决。

【问题讨论】：

标签： sql sql-server decimal

【解决方案1】：

SQL Server 进行整数除法。我通常只是乘以1.0 来避免这种情况：

SELECT RecruitmentSource,  COUNT(RecruitmentSource) AS NumberOfHired, 
       COUNT(RecruitmentSource) * 1.0/SUM(COUNT(RecruitmentSource)) OVER () AS PercentageHired
FROM HRDataset_v14$
GROUP BY RecruitmentSource

【讨论】：