SQL列转行

CREATE table a(
id int identity(1,1),
name nvarchar(50),
math nvarchar(50),
score nvarchar(50),
)

insert into a VALUES('张三','数学','50')
insert into a VALUES('李四','语文','60')

select * from a

SELECT name,cc ,ss 
from a
unPIVOT(ss for cc in (math,score)) as up
select * from a

cc表示的是要进行列转行的项

ss是列转行之后所对应的值

可以看下图做了解