Birden Fazla Satırı Tek Satırda Gösterme:

Declare @VisitId int
SET @VisitId = 0


SELECT CV.Id , CD.Name AS ConsultationNames
INTO #TmpTable1
FROM Sys_ConsultationVisit AS CV
LEFT JOIN Sys_ConsultationVisitDiagnostic ON Sys_ConsultationVisitDiagnostic.VisitId = CV.Id
LEFT JOIN Sys_ConsultationDiagnostic AS CD ON CD.Id = Sys_ConsultationVisitDiagnostic.DiagnosticId
WHERE @VisitId = 0 OR @VisitId = CV.Id


SELECT DISTINCT tt2.Id, 
    substring(
        (
            SELECT ' , '+tt1.ConsultationNames  AS [text()]
            FROM #TmpTable1 tt1
            WHERE tt1.Id = tt2.Id
            ORDER BY tt1.Id
            FOR XML PATH ('')
        ), 3, 1000) As Certificates
INTO #tmpCertificateTable
FROM #TmpTable1 tt2

SELECT * FROM #tmpCertificateTable
DROP TABLE #TmpTable1
DROP TABLE #tmpCertificateTable

Clean Buffer:

DBCC FREEPROCCACHE
DBCC DROPCLEANBUFFERS