How to convert Rows to Columns in Sql - sql

Question

I've a table Columns
and a second table Response in which all data is saved.
Now I want to create a SQL View in which the result should be like this
I tried using pivot
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;
but that didn't worked for me, I also referred this Efficiently convert rows to columns in sql server but was not able to implement it. Any ideas how to achieve the same in SQL View?
Scripts for Tables:
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)

Answer 1

Honestly, if the column types aren't going to change, or you only need a subset of them, you could just filter them out and then join on them rather than write a pivot. I wrote it using a cte, but they could just as easily be sub-queries:
;with fd as
(
select
UserID,
[Text] as FromDate,
row_number() over (partition by userID order by ID) as DEDUP
from response
where ColumnID = 1
),
td as
(
select
UserID,
[Text] as ToDate,
row_number() over (partition by userID order by ID) as DEDUP
from response
where ColumnID = 2
),
p as
(
select
UserID,
[Text] as Project,
row_number() over (partition by userID order by ID) as DEDUP
from response
where ColumnID = 3
),
c as
(
select
UserID,
[Text] as Comment,
row_number() over (partition by userID order by ID) as DEDUP
from response
where ColumnID = 4
)
select
fd.*,
td.ToDate,
p.Project,
c.Comment
from fd
inner join td
on fd.UserId = td.UserId
and fd.DEDUP = td.DEDUP
inner join p
on fd.UserId = p.UserId
and fd.DEDUP = p.DEDUP
inner join c
on fd.UserId = c.UserId
and fd.DEDUP = c.DEDUP

Answer 2

Try this. I worked on your answer.
select UserId ,FromDate, ToDate, Project, Comment
from
(
select R.UserId ,R.RText , C.ColumnName
from [Columns] C
INNER JOIN Response R ON C.Id=R.ColumnId
) d
pivot
(
Min(Rtext)
for ColumnName in (FromDate, ToDate, Project, Comment)
) piv
UNION
select UserId ,FromDate, ToDate, Project, Comment
from
(
select R.UserId ,R.RText , C.ColumnName
from [Columns] C
INNER JOIN Response R ON C.Id=R.ColumnId
) d
pivot
(
Max(Rtext)
for ColumnName in (FromDate, ToDate, Project, Comment)
) piv;

Answer 3

You can query like this
;with cte as
(
select r.*,
c.name
from Response r
inner join Columns c
on r.columnid = c.id
)
select
Userid,
max([FromDate]) as [FromDate],
max([ToDate]) as [ToDate],
max([Project]) as [Project],
max([Comment]) as [Comment]
from cte
pivot
(
max(Text) for name in ([FromDate], [ToDate], [Project], [Comment])
) p
group by userid