SQL列转行

SQL列转行

生成

sql代码

 
生成静态:
select *
from (select sname,[Course ] ='数学',[Score]=[数学] from Tb_students union all
select sname,[Course]='英语',[Score]=[英语] from Tb_students union all
select sname,[Course]='语文',[Score]=[语文] from Tb_students)t
order by sname,case [Course] when '语文' then 1 when '数学' then 2 when '英语' then 3 end
go
 --列转行的静态方案：UNPIVOT,sql2005及以后版本
 
  SELECT sname,Subject, grade
  from dbo.Tb_students
  unpivot(grade for Subject in([语文],[数学],[英语]))as up
  GO
  
  
  --列转行的动态方案：UNPIVOT,sql2005及以后版本
  --因为行是动态所以这里就从INFORMATION_SCHEMA.COLUMNS视图中获取列来构造行，同样也使用了XML处理。
 declare @s nvarchar(4000)
select @s=isnull(@s+',','')+quotename(Name)
from syscolumns where ID=object_id('Tb_students') and Name not in('sname')
order by Colid
exec('select sname,[Subject],[grade] from Tb_students unpivot ([grade] for [Subject] in('+@s+'))b')

go
select
    sname,[Subject],[grade]
from
    Tb_students
unpivot
    ([grade] for [Subject] in([数学],[英语],[语文]))b