sql - Display two column values as two row in SQL

Question

I am using SQL Server 2012 for my database. Now, I have one table with following details.

ID                COLUMN1              COLUMN2
1                    A                    B

Now i want result like this.

ID                   Values
1                       A   
1                       B

Can any one suggest me how to do? I know i can do using pivot or unpivot. but i dont know how to do? and is there other way to do this?

Please help me out to write query for the same.

Thanks in advance.

Answer 1

您可以使用 UNPIVOT 获得最终结果：

select id, value
from yourtable
unpivot
(
  value
  for col in (COLUMN1, COLUMN2)
) u;

请参阅带有演示的 SQL Fiddle

或者您可以使用 CROSS APPLY 来获取它：

select id, value
from yourtable
cross apply
(
  values ('COLUMN1', COLUMN1), ('COLUMN2', COLUMN2)
) c (col, value)

请参阅带有演示的 SQL Fiddle

Answer 2

select id, col1 as value
from your_table
union all
select id, col2 as value
from your_table