Transposing group from rows to column

Question

Hi Team,
I am having groups of rows of a fixed kind that need to be transposed to column. eg
Attrib 
Value
Attribute1
a
Attribute2
b
Attribute3
c
Attribute4
d
Attribute1
e
Attribute2
f
Attribute3
g
Attribute4
h
Attribute2
i
Attribute3
j
Attribute4
k
This need to be transposed as ;
Attribute1
Attribute2
Attribute3
Attribute4
a
b
c
d
e
f
g
h
NULL
i
j
k
Any help would be great...
I tried using  PIVOT like
pivot (min (AttributeValue) for rn in ([1], [2], [3], [4],[5], [6])) pvt  
where i was having rank in rn... but the places where Attribute1 is not present, that also nneed to become NULL. This is something I am not able to do.

Answer 1

Hi 
If
I may, there is very small fix to
Rishabh's query in order to make it work.
* as it is it will work only if the order of the insert fit the result, and not in any case! the SQL Server might bring the data in different order if there is no use of ORDER BY
Option 1: 
;with cte as
SELECT * , ROW_NUMBER () OVER (partition by Attrib ORDER BY (SELECT NULL)) as rnum
FROM T
--select * from cte
select [Attribute1],[Attribute2],[Attribute3],[Attribute4]
FROM
SELECT Attrib,Value , rnum
FROM cte
)p
PIVOT
(MAX(value) FOR Attrib IN ([Attribute1],[Attribute2],[Attribute3],[Attribute4]))pvt
Option 2: Another option for solution might be
;with MyCTE as (
select Attrib, Value, ROW_NUMBER() OVER (partition by Attrib order by (SELECT NULL)) RN
from T
select
MAX(CASE when Attrib = 'Attribute1' then Value END) as Attribute1
,MAX(CASE when Attrib = 'Attribute2' then Value END) as Attribute2
,MAX(CASE when Attrib = 'Attribute3' then Value END) as Attribute3
,MAX(CASE when Attrib = 'Attribute4' then Value END) as Attribute4
--, RN
from MyCTE
group by RN
And here is all together (check your solution which is the first, it will not bring the correct result since I changed the order of inserted)
create table T (Attrib NVARCHAR(100), Value NVARCHAR(10))
insert T values
('Attribute1', 'a'),
('Attribute2', 'b'),
('Attribute3', 'j'),
('Attribute3', 'c'),
('Attribute4', 'd'),
('Attribute1', 'e'),
('Attribute2', 'f'),
('Attribute3', 'g'),
('Attribute4', 'h'),
('Attribute2', 'i'),
('Attribute4', 'k')
GO
;with cte as
SELECT * , (ROW_NUMBER () OVER (ORDER BY (SELECT NULL)) -1 )/ 4 as rnum
FROM T
--select * from cte
select [Attribute1],[Attribute2],[Attribute3],[Attribute4]
FROM
SELECT Attrib,Value , rnum
FROM cte
)p
PIVOT
(MAX(value) FOR Attrib IN ([Attribute1],[Attribute2],[Attribute3],[Attribute4]))pvt
GO -- Not OK
;with MyCTE as (
select Attrib, Value, ROW_NUMBER() OVER (partition by Attrib order by (SELECT NULL)) RN
from T
select
MAX(CASE when Attrib = 'Attribute1' then Value END) as Attribute1
,MAX(CASE when Attrib = 'Attribute2' then Value END) as Attribute2
,MAX(CASE when Attrib = 'Attribute3' then Value END) as Attribute3
,MAX(CASE when Attrib = 'Attribute4' then Value END) as Attribute4
--, RN
from MyCTE
group by RN
GO -- OK
;with cte as
SELECT * , ROW_NUMBER () OVER (partition by Attrib ORDER BY (SELECT NULL)) as rnum
FROM T
--select * from cte
select [Attribute1],[Attribute2],[Attribute3],[Attribute4]
FROM
SELECT Attrib,Value , rnum
FROM cte
)p
PIVOT
(MAX(value) FOR Attrib IN ([Attribute1],[Attribute2],[Attribute3],[Attribute4]))pvt
GO --OK
drop table T
  Ronen Ariely
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