TSQL, der kombinerer flere rækker i én række

declare @T table (FileID int, ErrorCode int, ErrorDesc varchar(max), ErrorCount int)

insert into @T values
(1,             4,                    'Bad File Name',          3),
(2,             6,                    'Bad File Code',          56),
(3,             4,                    'Bad File Name',          2),
(3,             12,                   'Line Length Invalid',    3),
(3,             17,                   'Missing Req Fields',     150)

select FileID,
       (select cast(ErrorCode as varchar(10))+' '+ErrorDesc+' '+cast(ErrorCount as varchar(10))+' '
        from @T as T2
        where T1.FileID = T2.FileID
        for xml path(''), type).value('.', 'varchar(max)') 
from @T as T1
group by FileID