将不同的列整理成一个订单？

Question

我有一张这样的桌子;

Student_Name1   mark1  Student_Name2    mark2
-------------- ------ ---------------  --------
Kevin           77       Peter          78
Andrew          91       David          17
Scott           46       Bradley        28

如何将上表中的mark1和mark2按顺序排列，将所有名称和所有点组合在一起，如下所示？

Student_Name   mark
-------------- ------
Andrew          91
Peter           78
Kevin           77
Scott           46
Bradley         28
David           17

我正在使用MSSQL Server 2008 R2

Answer 1

使用UNION ALL：

Select    Student_Name1 As Student_Name,
          Mark1         As Mark
From      YourTable
Union All
Select    Student_Name2 As Student_Name,
          Mark2         As Mark
From      YourTable
Order By Mark Desc;

Answer 2

这是一个奇怪的桌面设计，但您可以将UNION用于此目的，例如

select * from (
select Student_Name1 as Student_Name,  mark1 as mark from student
union all
select Student_Name2 ,  mark2 from student ) xxx
order by mark desc;