Question

我想知道在SQL Server中是否可以这样做，而不是使用游标，因为它极其缓慢。有一个Cursor在它自己之前检查行和IF @Machine＆lt;＆gt; @MachineCur或@MachineStatus＆lt;＆gt; @MachinestatusCur或@sShift＆lt;＆gt; @sShiftCur然后插入表格。

CODE：

    SET ANSI_NULLS ON

    GO SET QUOTED_IDENTIFIER ON GO

    CREATE PROCEDURE [DBO].[MSTATE] @STARTDATE AS DATE, @ENDDATE AS DATE AS

    BEGIN

    SET NOCOUNT ON

    DECLARE @LINE AS VARCHAR(255), @MACHINE AS VARCHAR(255), @OBJECTTYPE AS VARCHAR(15), @INV AS VARCHAR(9), @MACHINESTATUS AS VARCHAR(255), @TIMESTART AS DATETIME, @TIMEEND AS DATETIME, @SSHIFT AS VARCHAR(100), @LINECUR AS VARCHAR(255), @MACHINECUR AS VARCHAR(255), @OBJECTTYPECUR AS VARCHAR(15), @INVCUR AS VARCHAR(9), @MACHINESTATUSCUR AS VARCHAR(255), @TIMESTARTCUR AS DATETIME, @TIMEENDCUR AS DATETIME, @SSHIFTCUR AS VARCHAR(100), @FIRST AS BIT

    IF @STARTDATE IS NULL SET @STARTDATE = '2015-01-01'
    IF @ENDDATE IS NULL SET @ENDDATE = GETDATE()

    TRUNCATE TABLE [DBO].[MSTATETEMP]

    DECLARE CUR10 CURSOR FOR

    SELECT [LINE],[MACHINE],[OBJECTTYPE],[INV],[MACHINESTATUS],[TIMESTART],[TIMEEND],[SSHIFT] FROM [DBO].[OEEQSTATEDATAPREVIEW] WHERE TIMESTART >= @STARTDATE AND TIMEEND <= @ENDDATE ORDER BY MACHINE, TIMESTART


    SET @FIRST = 0

        OPEN CUR10
                FETCH NEXT FROM CUR10 INTO @LINE, @MACHINE, @OBJECTTYPE, @INV, @MACHINESTATUS, @TIMESTART, @TIMEEND, @SSHIFT
            WHILE (@@FETCH_STATUS = 0)
        BEGIN

            IF @FIRST = 0   BEGIN

                                SET @LINECUR = @LINE
                                SET @MACHINECUR = @MACHINE
                                SET @OBJECTTYPECUR = @OBJECTTYPE 
                                SET @INVCUR = @INV
                                SET @MACHINESTATUSCUR = @MACHINESTATUS
                                SET @TIMESTARTCUR = @TIMESTART
                                SET @TIMEENDCUR = @TIMEEND 
                                SET @SSHIFTCUR = @SSHIFT
                                SET @FIRST = 1
                            END     

            IF @MACHINE <> @MACHINECUR OR @MACHINESTATUS <> @MACHINESTATUSCUR OR @SSHIFT <> @SSHIFTCUR
                        BEGIN   
                                INSERT INTO [DBO].[MSTATETEMP] (LINE, MACHINE, OBJECTTYPE, INV, MACHINESTATUS, TIMESTART, TIMEEND, SSHIFT) 
                                VALUES(@LINECUR, @MACHINECUR, @OBJECTTYPECUR, @INVCUR, @MACHINESTATUSCUR, @TIMESTARTCUR, @TIMESTART, @SSHIFTCUR)
                                SET @LINECUR = @LINE
                                SET @MACHINECUR = @MACHINE
                                SET @OBJECTTYPECUR = @OBJECTTYPE 
                                SET @INVCUR = @INV
                                SET @MACHINESTATUSCUR = @MACHINESTATUS
                                SET @TIMESTARTCUR = @TIMESTART
                                SET @TIMEENDCUR = @TIMEEND 
                                SET @SSHIFTCUR = @SSHIFT
                        END
            FETCH NEXT FROM CUR10 INTO @LINE, @MACHINE, @OBJECTTYPE, @INV, @MACHINESTATUS, @TIMESTART, @TIMEEND, @SSHIFT
        END
        CLOSE CUR10
        DEALLOCATE CUR10

        SELECT LINE, MACHINE, OBJECTTYPE, INV, MACHINESTATUS, TIMESTART, TIMEEND, SSHIFT FROM [DBO].[MSTATETEMP] ORDER BY MACHINE, TIMESTART

    END

[DBO]的结果。[OEEQSTATEDATAPREVIEW]（插入的行将为1和3）：

Line    Machine OBJECTTYPE  INV         MACHINESTATUS   TIMESTART               TIMEEND                 SSHIFT
410     410     Linje       Invald      limit kapacitet 2015-11-06 17:00:00.000 2015-11-06 17:10:00.000 Night
410     410     Linje       Invald      limit kapacitet 2015-11-06 17:20:00.000 2015-11-06 17:30:00.000 Night
410     410     Linje       Ej invald   Avstalld        2015-11-06 19:21:01.000 2015-11-06 19:21:04.000 Night

Answer 1

尝试使用CTE创建唯一的行标识符，然后您可以进行简单的选择

WITH CTE AS
(
    SELECT ROW_NUMBER() OVER (ORDER BY Machine,TimeStart,TimeEnd) AS RowNum
        ,*
    FROM DBO.OEEQSTATEDATAPREVIEW
)
INSERT INTO MSTATETEMP
(Line,Machine,OBJECTTYPE,INV,MACHINESTATUS,TIMESTART,TIMEEND,SSHIFT)
SELECT Line,Machine,OBJECTTYPE,INV,MACHINESTATUS,TIMESTART,TIMEEND,SSHIFT
FROM CTE AS C
WHERE C.RowNum = 1
    OR EXISTS
    (
        SELECT 1 
        FROM CTE AS _C
        WHERE C.RowNum = _C.RowNum + 1
            AND (C.Machine <> _C.Machine OR C.MACHINESTATUS <> _C.MACHINESTATUS OR C.SSHIFT <> _C.SSHIFT)
    )
    ;

更改存储过程 - 游标MSSQL

1 个答案: