我有一个表格Columns
还有第二个表格Response
,其中保存了所有数据。
我尝试使用枢轴
select UserId ,FromDate, ToDate, Project, Comment
from
(
select R.UserId ,R.Text , C.ColumnName
from [Columns] C
INNER JOIN Response R ON C.Id=R.ColumnId
) d
pivot
(
max(Text)
for ColumnName in (FromDate, ToDate, Project, Comment)
) piv;
但对我没有用,我还参考了此在 SQL Server 中高效地将行转换为列,但无法实现。你有什么想法如何在 SQL 视图中实现相同的功能吗?
表脚本: |
---|
CREATE TABLE [dbo].[Columns](
[Id] [bigint] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](1000) NULL,
[IsActive] [bit] NULL,
CONSTRAINT [PK_Columns] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
insert into [Columns] values('FromDate',1)
insert into [Columns] values('ToDate',1)
insert into [Columns] values('Project',1)
insert into [Columns] values('Comment',1)
CREATE TABLE [dbo].[Response](
[Id] [bigint] IDENTITY(1,1) NOT NULL,
[UserId] [bigint] NOT NULL,
[ColumnId] [bigint] NOT NULL,
[Text] [nvarchar](max) NULL,
[IsActive] [bit] NULL,
CONSTRAINT [PK_Response] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
insert into [Response] values(1,1,'1/1/2012',1)
insert into [Response] values(1,2,'1/2/2012',1)
insert into [Response] values(1,3,'p1',1)
insert into [Response] values(1,4,'c1',1)
insert into [Response] values(2,1,'1/1/2013',1)
insert into [Response] values(2,2,'1/2/2013',1)
insert into [Response] values(2,3,'p2',1)
insert into [Response] values(2,4,'c2',1)
insert into [Response] values(2,1,'1/1/2014',1)
insert into [Response] values(2,2,'1/2/2014',1)
insert into [Response] values(2,3,'p3',1)
insert into [Response] values(2,4,'c3',1)
insert into [Response] values(3,1,'1/1/2015',1)
insert into [Response] values(3,2,'1/2/2015',1)
insert into [Response] values(3,3,'p4',1)
insert into [Response] values(3,4,'c4',1)