Pivot Dynamic Columns, no Aggregation

Question

I have questionnaire data in, SQL Server 2008, that I want to transpose to a matrix.
I saw several posts about the same topic, but I just don\'t get pivoting.

Answer 1

Yes you can perform a dynamic pivot. Sometimes it is easier to work up the PIVOT query using a static version first so you can see how the query and results will appear. Then transform the query into a dynamic version.

Here is an example of a static vs. dynamic version of a query:

Static (SQL Fiddle):

select *
from 
(
    select u.userid,
        u.fname,
        u.lname,
        u.mobile,
        r.question,
        r.choice
    from users u
    left join results r
        on u.questionid = r.questionid
        and u.choiceid = r.choiceid
) x
pivot
(
    min(choice)
    for question in([are you], [from])
) p

Dynamic (SQL Fiddle):

DECLARE @cols AS NVARCHAR(MAX),
    @query  AS NVARCHAR(MAX)

SET @cols = STUFF((SELECT distinct ',' + QUOTENAME(c.question) 
            FROM results c
            FOR XML PATH(''), TYPE
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'')

set @query = 'SELECT userid, fname, lname, mobile, ' + @cols + ' from 
            (
                select u.userid,
                    u.fname,
                    u.lname,
                    u.mobile,
                    r.question,
                    r.choice
                from users u
                left join results r
                    on u.questionid = r.questionid
                    and u.choiceid = r.choiceid
           ) x
            pivot 
            (
                min(choice)
                for question in (' + @cols + ')
            ) p '


execute(@query)

If you can provide more details around your current table structure and then some sample data. We should be able to help you create the version that you would need for your situation.

As I said though, sometimes it is easier to start with a static version, where you hard-code in the columns that you need to transform first, then move on to the dynamic version.