SQL Server Query LEFT JOIN, SUM and GROUP BY and I'm stumped!

Question

I am beating my brain against this one

I have 3 SQL Server 2005 tables

userawards:

id, awardamount, userid, dateawarded, aw         


        

Answer 1

If I understand this correctly, there should be no more than one row per user and you need a total award amount per user. On other side you want to know what kind of awards every user had. You can show comma delimited list of awards for every user:

select 
    usr.FirstName,
    usr.LastName, 
    awd.AwardAmount,
    AwardTypes = (   
        select Title + ','
        from UserAwards uaw
            join AwardTypes awt on
                uaw.AwardTypeId = awt.Id
        where uaw.UserId = usr.id
        for xml path(''))
from [User] usr
    join (
        select UserId, sum(AwardAmount) AwardAmount
        from UserAwards uaw
        group by UserId
    ) awd on
        awd.UserId = usr.Id