Вы можете вернуть либо Max
, либо Min
идентификатор ошибки
SELECT TOP(10) COUNT([BugTitle]) AS 'BugCount', [BugTitle], [ErrLine], MIN([BugId]) AS 'BugId'
FROM [Bugs]
WHERE [BugDate] >= DateAdd(Day, -30, DateDiff(Day, 0, GetDate()))
GROUP BY [BugTitle], [ErrLine]
ORDER BY COUNT([BugTitle]) DESC