SQL Server 并发死锁解决案例备忘

SET @sql = '
                SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
                SET DEADLOCK_PRIORITY 10
                BEGIN TRAN
                    DECLARE @QuestionList TABLE(ID BIGINT,StudentCode NVARCHAR(50))
                    
                    INSERT INTO @QuestionList(ID,StudentCode)
                    SELECT TOP '+CAST((@QuestionCount*@MinorQuestionCount) AS NVARCHAR(10))+' SS.ID,SS.StudentCode  
                    FROM ['+@CourseID+'_SubjectiveScoreInfo] AS SS WITH(UPDLOCK,READPAST)
                        INNER JOIN SubjectiveItemInfo AS SI
                            ON SS.TestCode=SI.TestCode 
                                AND SS.MajorQuestionID=SI.MajorQuestionID 
                                AND SS.MinorQuestionID=SI.MinorQuestionID
                    WHERE SS.TestCode=''' + @TestCode + '''   
                        AND SS.MarkingStatusID = 1  
                        AND SI.QuestionGroupCode=''' + @QuestionGroupCode + '''   
                        AND (SI.MinorQuestionCount=0 
                            OR SI.MinorQuestionID>0)
                        AND SS.MarkingStepID < 3
                        AND (HandledID1 IS NULL OR HandledID1 <> '''+ @HandledID +''')
                        AND (HandledID2 IS NULL OR HandledID2 <> '''+ @HandledID +''')
                        AND NOT EXISTS
                        (
                            SELECT TOP 1 1 
                            FROM ['+@CourseID+'_SubjectiveScoreInfoFlag] WITH(NOLOCK)
                            WHERE AR = 0 AND ID = SS.ID
                            GROUP BY ID
                            HAVING ((SS.MarkingStepID <2 AND COUNT(*) >= 2) OR (SS.MarkingStepID = 2 AND COUNT(*) >= 3))
                        )
                    ORDER BY SS.StudentCode,SS.MajorQuestionID
                        
                    INSERT INTO #TStudentCode(StudentCode,TaskHandledID,HandleStepId)
                    SELECT DISTINCT TOP '+CAST(@QuestionCount AS NVARCHAR(10))+' StudentCode, null ,0
                    FROM @QuestionList

                    INSERT INTO ['+@CourseID+'_SubjectiveScoreInfoFlag](AR,ID)
                    SELECT 0,ID
                    FROM @QuestionList

                COMMIT TRAN
            ' 
            PRINT @sql
            EXEC  sp_executesql @sql