T SQL关于分组的查询

Question

第一个图像是我的查询输出。现在我想分组这个主题，以便它变得像第二个图像。可能吗？谢谢您的帮助。

select Subject, Grade, case when Grade >= 50 Then '1' else '0' end as Pass, case when Grade < 50 Then '1' else '0' end as Fail from Grade_report

OUTPUT：

我要的是：

Answer 1

你的规格是不是非常精确;你对合并记录的年级有什么期望，应该只写1或0还是合计通过和失败的总和？

下将产生的输出，它需要的传球MAX的档次和SUM /失败信息：

WITH GradePassFail AS (
    SELECT 
     Subject, 
     Grade, 
     CASE WHEN Grade >= 50 THEN 1 ELSE 0 END AS Pass, 
     CASE WHEN Grade < 50 THEN 1 ELSE 0 END AS Fail 
    FROM Grade_report 
) 
SELECT Subject, MAX(Grade) AS Grade, SUM(Pass) AS Pass, SUM(Fail) AS Fail 
FROM GradePassFail 
GROUP BY Subject