Query to pivot in SQL - sql

Question

I have data in the following format:
I need to pivot this to get the data as follows.
Please help!!!

Answer 1

Something like this. In this case you need to have a fixed list of names.
SELECT
SUM(CASE WHEN Student='Mike' THEN [English Mark] ELSE 0 END) as [Mike English Mark],
SUM(CASE WHEN Student='Mike' THEN [Maths Mark] ELSE 0 END) as [Mike Maths Mark],
SUM(CASE WHEN Student='Fisher' THEN [English Mark] ELSE 0 END) as [Fisher English Mark],
SUM(CASE WHEN Student='Fisher' THEN [Maths Mark] ELSE 0 END) as [Fisher Maths Mark],
SUM(CASE WHEN Student='John' THEN [English Mark] ELSE 0 END) as [John English Mark],
SUM(CASE WHEN Student='John' THEN [Maths Mark] ELSE 0 END) as [John Maths Mark],
[TestName]
FROM Table1
GROUP BY [Test Name]

Answer 2

The solution I got is a bit tricky but very dynamic.
You should first unpivot your table, and put the data in a temp table, after that I get the columns name for the pivoting and put the result in the #cols variable. At the end I create a dynamic sql string to pivot the the temp table that contains my data, so even if a new student gets added to the table his 2 columns will be generated in the end result.
select test, col + ' '+ Student stu_col , value
INTO
#temp
from Marks
unpivot(value for col in (english, maths)) unpiv
DECLARE #cols AS NVARCHAR(MAX), #query AS NVARCHAR(MAX)
select #cols = STUFF((SELECT distinct ',' + QUOTENAME(stu_col)
from #temp order by 1
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT test, ' + #cols + ' from
(
select test, Value, stu_col
from #temp
) x
pivot
(
SUM(Value)
for stu_col in (' + #cols + ')
) p '
exec(#query)
DROP TABLE #temp

Answer 3

You can write a dynamic sql query using Pivot operator as:
DECLARE #columns NVARCHAR(MAX)
,#columnsEnglish_Mark NVARCHAR(MAX)
,#columnsMath_Mark NVARCHAR(MAX)
,#columnsFNL NVARCHAR(MAX)
,#sql NVARCHAR(MAX);
SET #columns = N'';
--Get column names for entire pivoting
SELECT #columns += N', ' + QUOTENAME(SpreadCol)
FROM (select distinct student as SpreadCol
from tblstudent
) AS T;
PRINT #columns;
--Get column names for Pivot1
SET #columnsEnglish_Mark = N'';
SELECT #columnsEnglish_Mark += N', ISNULL(' + QUOTENAME(SpreadCol) + ',0) AS [' + SpreadCol + '_English_Mark]'
FROM (select distinct student as SpreadCol
from tblstudent
) AS T
;
PRINT #columnsEnglish_Mark;
--Get column names for Pivot2
SET #columnsMath_Mark = N'';
SELECT #columnsMath_Mark += N', ISNULL(' + QUOTENAME(SpreadCol) + ',0) AS [' + SpreadCol + '_Math_Mark]'
FROM (select distinct student as SpreadCol
from tblstudent
) AS T
;
PRINT #columnsMath_Mark;
--Get final list of columns:
SET #columnsFNL = N'';
SELECT #columnsFNL += N', [' + SpreadCol + '_English_Mark], [' + SpreadCol + '_Math_Mark] '
FROM (select distinct student as SpreadCol
from tblstudent
) AS T
order by T.SpreadCol asc; -- change ordering of columns here
PRINT #columnsFNL;
SET #sql = N'
select tblEnglish_Mark.Test_Name , ' + STUFF(#columnsFNL, 1, 2, '') + ' from
'
+
'
( SELECT Test_Name, ' + STUFF(#columnsEnglish_Mark, 1, 2, '') + '
FROM
(select student as SpreadCol , English_Mark, Test_Name
from tblstudent ) as D
PIVOT
(
sum(English_Mark) FOR SpreadCol IN ('
+ STUFF(REPLACE(#columns, ', [', ',['), 1, 1, '')
+ ')
) AS Pivot1 ) tblEnglish_Mark
inner join
'
+
'
( SELECT Test_Name, ' + STUFF(#columnsMath_Mark, 1, 2, '') + '
FROM
(select student as SpreadCol , Test_Name,Math_Mark
from tblstudent ) as D
PIVOT
(
MAx(Math_Mark) FOR SpreadCol IN ('
+ STUFF(REPLACE(#columns, ', [', ',['), 1, 1, '')
+ ')
) as Pivot2 ) tblMath_Mark
on tblEnglish_Mark.Test_Name = tblMath_Mark.Test_Name ;
'
;
PRINT #sql;
EXEC sp_executesql #sql;
Hope this helps!!!

Answer 4

Please try:
DECLARE #pivv NVARCHAR(MAX),#Query NVARCHAR(MAX)
SELECT #pivv=COALESCE(#pivv+',','')+ QUOTENAME(Student+'_English_Mark')+','+QUOTENAME(Student+'_Maths_Mark')
FROM YourTable GROUP BY Student
IF ISNULL(#pivv, '')<>''
SET #Query='SELECT* FROM(
select English_Mark Marks, Student+''_English_Mark'' Col, Test_Name From YourTable
union all
select Maths_Mark Marks, Student+''_Maths_Mark'' Col, Test_Name From YourTable
)x pivot (sum(Marks) for Col in ('+#pivv+')) as xx'
IF ISNULL(#Query, '')<>''
EXEC (#Query)
SQL Fiddle Demo