如何在SQL查詢中添加來自不同行的數據並將其顯示為一行的列

Question

我是SQL查詢字段中的新手，但可以進行一些查詢。 我想在表行中添加相關數據，並在同一列中顯示它們。 這是包含數據的表：

任何幫助將不勝感激。 提前致謝

Answer 1

如果實際上只有3個問題，並且假設表名為“學生”，則可以執行以下操作：

select studentid AS Student,
(select Questionpoints from Student where studentid = a.studentid and Questionid = 8) AS Qn1,
(select Questionpoints from Student where studentid = a.studentid and Questionid = 9) AS Qn2,
(select Questionpoints from Student where studentid = a.studentid and Questionid = 10) AS Qn3
from Student as a
group by studentid;