Select row to column SQL - sql

Question

I didn't meet row to column before, can you help me?
This is example of my source.
And I want to select from:
Id Project ID Date Hour
-------------------------------
1 Project-1 1/1/2010 10
2 Project-1 1/2/2010 2
3 Project-1 1/3/2010 3
4 Project-1 1/4/2010 5
5 Project-2 1/1/2010 3
6 Project-2 1/2/2010 4
7 Project-2 1/3/2010 2
8 Project-2 1/4/2010 7
9 Project-3 1/1/2010 5
10 Project-3 1/2/2010 6
11 Project-3 1/3/2010 4
.
.
.
to
Project ID 1/1/2010 1/2/2010 1/3/2010 1/4/2010 ...
----------------------------------------------------------------
Project-1 10 2 3 5
Project-2 3 4 2 7
Project-3 5 6 4
Please help me.
UPDATE:
This is my solution.
--============== Create stored procedure ============
if exists(select * from sys.procedures where name='usp_ProjectFollow')
drop procedure usp_ProjectFollow
go
create proc usp_ProjectFollow
as
begin
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX)
Declare #ParamDefinition AS NVarchar(MAX)
SELECT #cols = STUFF((SELECT ',' + QUOTENAME([Date])
FROM MyTable
group by [Date]
order by [Date]
FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)') ,1,1,'')
set #query = 'SELECT id, ProjectName, ProjectCode, ' + #cols +
' FROM MyTable
pivot
(
sum(Hour)
for Date in (' + #cols + ')
) p '
--print #query
execute sp_Executesql #query
end
go
hope it's will help someone need.

Answer 1

A static solution is using this type of query:
SELECT
ProjectID,
SUM(CASE WHEN Date = '1/1/2010' THEN Hour ELSE 0 END) As '1/1/2010',
SUM(CASE WHEN Date = '1/2/2010' THEN Hour ELSE 0 END) As '1/2/2010',
SUM(CASE WHEN Date = '1/3/2010' THEN Hour ELSE 0 END) As '1/3/2010',
SUM(CASE WHEN Date = '1/4/2010' THEN Hour ELSE 0 END) As '1/4/2010',
...
FROM
yourTable
GROUP BY
ProjectID;
For using a dynamic solution you need to use dynamic SQL like this:
Declare #SQL nvarchar(MAX)
SELECT #SQL = ISNULL(#SQL, 'SELECT ProjectID') + ', SUM(CASE WHEN Date = ''' + [Date] + ''' THEN [Hour] ELSE 0 END) As [' + [Date] + ']'
FROM #t
GROUP BY [Date]
SELECT #SQL = #SQL + ' FROM yourTable GROUP BY ProjectID;'
EXEC(#SQL)