我需要存储在多个表中的行超过500000行。用我的逻辑获取所有行。 在这种情况下，我编写了一个在SQL Server浏览器中成功执行的存储过程，但是当我从C＃代码运行它时，发生了超时异常。
有人可以建议我如何改进我的存储过程吗？
CREATE PROCEDURE [dbo].[SP_ExtendedPTU]
(
@SQLForPTU as varchar(MAX)
)
AS
BEGIN TRAN
--DECLARE
--@SQLForPTU as varchar(MAX)
--SET @SQLForPTU= 'WHERE OrderID IN(4233)And OrderType =3'
BEGIN--1
DECLARE
@ProductionTracingUnitID as int,
@OrderID as int,
@OrderType as smallint,
@ProductID as int,
@LabLabDipID as int,
@ColorName as varchar(255),
@PantonNo as varchar(127),
@Shade as varchar(4),
@DyeingOrderQty as decimal(30, 17),
@JobOrderQty as decimal(30, 17),
@ProductionPipeLineQty as decimal(30, 17),
@ProductionFinishedQty as decimal(30, 17),
@DeliveryQty as decimal(30, 17),
@BuyerID as int,
@FactoryID as int,
@ProductionGraceQty as decimal(30, 17),
@WeightLossGainQty as decimal(30, 17),
@RateInLBS as decimal(30, 17),
@State as smallint,
@ProductionLossQty as decimal(30, 17),
@ReturnQty as decimal(30, 17),
@ActualDeliveryQty as decimal(30,17),
@ReadyStockInhand as decimal(30, 17),
@JobOrderQtyApproved as decimal(30, 17),
@OrderNumber as varchar(50),
@FactoryName as varchar(200),
@BuyerName as varchar(200),
@ProductName as varchar(200),
@YetToDelivery as decimal(30,17),
@StockInHand as decimal(30,17),
@YetToProduction as decimal(30,17),
@LCID as int,
@LCNo as varchar(300),
@PIQty as decimal(30,17),
@ChangingQty as decimal(30,17),
@SampleAdjQty as decimal(30,17),
@SampleAdjValue as decimal(30,17),
@MKTPersonID as int,
@MKTPersonName as varchar(500),
@MerchandiserID as int,
@MerchandiserName as varchar(500),
@AmendmentStatus as smallint,
@AcceptanceValue as decimal(30,17),
@MaturityValue as decimal(30,17),
@BillAcceptanceValue as decimal(30,17),
@BillMaturityValue as decimal(30,17),
@BillAcceptancePercentage as decimal(30,17),
@BillMaturityPercentage as decimal(30,17),
@ExportLCValue as decimal(30,17),
@Acceptance as varchar(100),
@Maturity as varchar(100),
@YarnCount as varchar(50),
@PTUDQty as decimal(30,17),
@ShadeFromOrder as smallint,
@EWYDLRelabNo as varchar(100),
@EWYDLColorNo as varchar(100),
@DeliveryTo as int,
@FactoryPersonnelID as int,
@BuyerPersonnelID as int,
@OrderRcvBy as int,
@OrderState as smallint
CREATE TABLE #TempTableOne(
ProductionTracingUnitID int,
OrderID int,
OrderType smallint,
ProductID int,
DyeingOrderQty decimal(30,17),
JobOrderQty decimal(30,17),
ProductionPipeLineQty decimal(30,17),
ProductionFinishedQty decimal(30,17),
DeliveryQty decimal(30,17),
BuyerID int,
FactoryID int,
ProductionGraceQty decimal(30,17),
WeightLossGainQty decimal(30,17),
RateInLBS decimal(30,17),
ProductionLossQty decimal(30,17),
ActualDeliveryQty decimal(30,17),
ReadyStockInhand decimal(30,17),
OrderNumber varchar(50),
FactoryName varchar(200),
BuyerName varchar(200),
ProductName varchar(200),
ColorName varchar(200),
LabLabDipID int,
ReturnQty decimal(30,17),
YetToDelivery decimal(30,17),
StockInHand decimal(30,17),
YetToProduction decimal(30,17),
LCID int,
LCNo varchar(300),
PIQty decimal(30,17),
ChangingQty decimal(30,17),
SampleAdjQty decimal(30,17),
SampleAdjValue decimal(30,17),
MKTPersonID int,
MKTPersonName varchar(500),
MerchandiserID int,
MerchandiserName varchar(500),
AmendmentStatus smallint,
Acceptance varchar(100),
Maturity varchar(100),
YarnCount varchar(50),
EWYDLRelabNo varchar(50),
EWYDLColorNo varchar(50),
ShadeFromOrder smallint
)
--ProductionTracingUnitID,OrderID,OrderType,ProductID,LabLabDipID,ColorName,PantonNo,EWYDLColorNo,Shade,EWYDLRelabNo,DyeingOrderQty,JobOrderQty,ProductionPipeLineQty,ProductionFinishedQty,DeliveryQty,BuyerID,FactoryID,ProductionGraceQty,WeightLossGainQty,RateInLBS,State,ProductionLossQty,ShadeFromOrder,ReturnQty,ActualDeliveryQty,ReadyStockInhand,JobOrderQtyApproved
DECLARE
@SQL as varchar(MAX)
SET @SQL=
'
DECLARE Cur_AB1 CURSOR GLOBAL FORWARD_ONLY KEYSET FOR
SELECT ProductionTracingUnitID,OrderID,OrderType,ProductID,DyeingOrderQty,JobOrderQty,ProductionPipeLineQty,ProductionFinishedQty,BuyerID,FactoryID,ProductionGraceQty,WeightLossGainQty,RateInLBS,ProductionLossQty,ActualDeliveryQty,ReadyStockInhand,ColorName,LabLabDipID,ReturnQty,EWYDLRelabNo,EWYDLColorNo,ShadeFromOrder FROM ProductionTracingUnit '+@SQLForPTU+'
'
EXEC (@SQL)
OPEN Cur_AB1
FETCH NEXT FROM Cur_AB1 INTO @ProductionTracingUnitID,@OrderID,@OrderType,@ProductID,@DyeingOrderQty,@JobOrderQty,@ProductionPipeLineQty,@ProductionFinishedQty,@BuyerID,@FactoryID,@ProductionGraceQty,@WeightLossGainQty,@RateInLBS,@ProductionLossQty,@ActualDeliveryQty,@ReadyStockInhand,@ColorName,@LabLabDipID,@ReturnQty,@EWYDLRelabNo,@EWYDLColorNo,@ShadeFromOrder
WHILE(@@Fetch_Status <> -1)
BEGIN--2
SET @LCID=0
SET @LCNo=''
SET @PIQty=0
SET @AcceptanceValue =0
SET @MaturityValue= 0
SET @Acceptance= ''
SET @Maturity =''
SET @DeliveryQty=@ActualDeliveryQty-@ReturnQty
SET @YetToDelivery=@JobOrderQty-@ActualDeliveryQty+@ReturnQty
set @PTUDQty=(select sum(Qty) from PTUDistribution where ProductionTracingUnitID=@ProductionTracingUnitID )
IF(@PTUDQty>@YetToDelivery)
BEGIN--sih
SET @StockInHand =@YetToDelivery
END --sih
ELSE
BEGIN--sih2
SET @StockInHand =@PTUDQty
END --sih2
SET @YetToProduction=@JobOrderQty-@ReadyStockInhand-@ActualDeliveryQty+@ReturnQty
IF (@YetToProduction<0)
BEGIN
SET @YetToProduction=0
END
SET @ChangingQty=0
SET @SampleAdjQty=0
SET @SampleAdjValue=0
SET @MerchandiserID=0
SET @MerchandiserName=''
SET @MKTPersonID =0
SET @AmendmentStatus=0
SET @AcceptanceValue =0
SET @MaturityValue= 0
SET @Acceptance= ''
SET @Maturity =''
SET @MKTPersonName =''
SET @OrderNumber=''
IF(@OrderType=3)
BEGIN--jam1
SET @OrderNumber=(SELECT ISNULL(JobCode,'')+' - '+ISNULL(JobNo,'')+' / '+ISNULL(JobYear,'') FROM Job WHERE JobID=@OrderID)
SELECT @LCID=ISNULL(ExportLCID,0), @LCNo=ISNULL(ExportLCNo,''),@AmendmentStatus=AmendmentStatus,@ExportLCValue=Amount FROM ExportLC WHERE ExportLCID =(SELECT LCID FROM [PI] WHERE PIID=(SELECT PIID FROM Job WHERE JobID=@OrderID))
SELECT @PIQty=ISNULL(SUM(Qty),0), @SampleAdjQty=ISNULL(SUM(AdjQty),0), @SampleAdjValue=ISNULL(SUM(AdjValue),0) FROM PIProducts WHERE PIID=(SELECT PIID FROM Job WHERE JobID=@OrderID) AND ProductID=@ProductID
SET @ChangingQty=(SELECT ISNULL(SUM(Qty),0) FROM PIDeliverableProducts WHERE PIID=(SELECT PIID FROM Job WHERE JobID=@OrderID) AND ProductID=@ProductID)
SELECT @MKTPersonID=EWYDLMarketingEmpID, @MerchandiserID=CmsBCPID FROM [PI] WHERE PIID=(SELECT PIID FROM Job WHERE JobID=@OrderID)
SET @MerchandiserName=(SELECT ISNULL([Name],'') FROM ContactPersonnel WHERE ContactPersonnelID=@MerchandiserID)
SET @MKTPersonName =(SELECT [Name] FROM Employee WHERE EmployeeID=@MKTPersonID)
SET @BillAcceptanceValue=(select isnull(sum(Amount),0) from LCbill where EXportLCID=@LCID and [state] in (2,3,4))
SET @BillMaturityValue =(select isnull(sum(Amount),0) from LCbill where EXportLCID=@LCID and [state] in (5,6,7,8,9,10,12))
IF(@ExportLCValue>0 and @ExportLCValue is not null)
BEGIN
SET @BillAcceptancePercentage =(@BillAcceptanceValue*100)/@ExportLCValue -- bill Percentage
SET @BillMaturityPercentage =(@BillMaturityValue*100)/@ExportLCValue
SET @AcceptanceValue=(@ChangingQty*@RateInLBS)*(@BillAcceptancePercentage/100)--Percentage Wise PI Valu
SET @MaturityValue=(@ChangingQty*@RateInLBS)*(@BillMaturityPercentage/100)
IF((@ChangingQty*@RateInLBS)>0 and (@ChangingQty*@RateInLBS) is not null)
BEGIN
SET @AcceptanceValue=(@AcceptanceValue*100)/(@ChangingQty*@RateInLBS)-- PI ValuePercentage
SET @MaturityValue=(@MaturityValue*100)/(@ChangingQty*@RateInLBS)
END
SET @Acceptance=Convert(varchar(20),(CONVERT(float,round((@AcceptanceValue+@MaturityValue),0)))) +'%'
SET @Maturity =Convert(varchar(20),(CONVERT(float,round(@MaturityValue,0)))) +'%'
END
SET @FactoryName=''
IF(@FactoryID>0)
BEGIN--jam3
SET @FactoryName=(SELECT [Name] FROM Contractor WHERE ContractorID=@FactoryID)
END--jam3
SET @BuyerName=''
IF(@BuyerID>0)
BEGIN--jam4
SET @BuyerName=(SELECT [Name] FROM Contractor WHERE ContractorID=@BuyerID)
END--jam4
END--jam1
ELSE
BEGIN --jam2 IF Sample
SET @LCID=0
SET @LCNo=''
SET @OrderNumber=''
SET @PIQty=0
SET @DeliveryTo=0
SET @FactoryPersonnelID=0
SET @BuyerPersonnelID=0
SET @OrderRcvBy=0
SET @ChangingQty=0
SET @MerchandiserName=''
SET @MKTPersonName=''
SET @OrderState=0
SET @AmendmentStatus=0
SET @PIQty= (SELECT ISNULL(SUM(Qty),0) FROM SampleOrderDetail WHERE PTUID=@ProductionTracingUnitID)
SET @ChangingQty=@PIQty
SELECT @OrderNumber=ISNULL(SampleOrderNo,''), @DeliveryTo=ISNULL(DeliveryTo,0),@FactoryPersonnelID=ISNULL(FactoryPersonnelID,0),@BuyerPersonnelID=ISNULL(BuyerPersonnelID,0),@OrderRcvBy=ISNULL(OrderRcvBy,0),@OrderState=ISNULL(OrderState,0) FROM SampleOrder WHERE SampleOrderID=@OrderID
SET @AmendmentStatus=@OrderState
IF(@DeliveryTo=3)
BEGIN
SET @MerchandiserName=(SELECT ISNULL([Name],'') FROM ContactPersonnel WHERE ContactPersonnelID=@FactoryPersonnelID)
END
IF(@DeliveryTo=2)
BEGIN
SET @MerchandiserName=(SELECT ISNULL([Name],'') FROM ContactPersonnel WHERE ContactPersonnelID=@BuyerPersonnelID)
END
SET @MKTPersonName =(SELECT [Name] FROM Employee WHERE EmployeeID=@OrderRcvBy)
IF(@DeliveryTo=3)
BEGIN
SET @FactoryName=(SELECT [Name] FROM Contractor WHERE ContractorID=@FactoryID)
END
IF(@DeliveryTo=2)
BEGIN
SET @FactoryName=(SELECT [Name] FROM Contractor WHERE ContractorID=@BuyerID)
END
SET @BuyerName=''
IF(@BuyerID>0)
BEGIN--jam4
SET @BuyerName=(SELECT [Name] FROM Contractor WHERE ContractorID=@BuyerID)
END--jam4
END--jam2
SET @ProductName=''
SET @YarnCount =''
SELECT @ProductName=('['+ Code+ '] '+ [Name]), @YarnCount =[Count] FROM Yarncategory WHERE YarncategoryID=@ProductID
INSERT INTO #TempTableOne Values(ISNULL(@ProductionTracingUnitID,0),ISNULL(@OrderID,0),ISNULL(@OrderType,0),ISNULL(@ProductID,0),ISNULL(@DyeingOrderQty,0),ISNULL(@JobOrderQty,0),ISNULL(@ProductionPipeLineQty,0),ISNULL(@ProductionFinishedQty,0),ISNULL(@DeliveryQty,0),ISNULL(@BuyerID,0),ISNULL(@FactoryID,0),ISNULL(@ProductionGraceQty,0),ISNULL(@WeightLossGainQty,0),ISNULL(CONVERT (decimal(18,2),@RateInLBS),0),ISNULL(@ProductionLossQty,0),ISNULL(@ActualDeliveryQty,0),ISNULL(@ReadyStockInhand,0),ISNULL(@OrderNumber,''),ISNULL(@FactoryName,''),ISNULL(@BuyerName,''),ISNULL(@ProductName,''),ISNULL(@ColorName,''),ISNULL(@LabLabDipID,0),ISNULL(@ReturnQty,0),ISNULL(@YetToDelivery,0),ISNULL(@StockInHand,0),ISNULL(@YetToProduction,0),ISNULL(@LCID,0),ISNULL(@LCNo,''),ISNULL(@PIQty,0),ISNULL(@ChangingQty,0),ISNULL(@SampleAdjQty,0),ISNULL(@SampleAdjValue,0),ISNULL(@MKTPersonID,0),ISNULL(@MKTPersonName,''),ISNULL(@MerchandiserID,0),ISNULL(@MerchandiserName,''),ISNULL(@AmendmentStatus,0),ISNULL(@Acceptance,''),ISNULL(@Maturity,''),ISNULL(@YarnCount,''),ISNULL(@EWYDLRelabNo,''),ISNULL(@EWYDLColorNo,''),ISNULL(@ShadeFromOrder,0))
FETCH NEXT FROM Cur_AB1 INTO @ProductionTracingUnitID,@OrderID,@OrderType,@ProductID,@DyeingOrderQty,@JobOrderQty,@ProductionPipeLineQty,@ProductionFinishedQty,@BuyerID,@FactoryID,@ProductionGraceQty,@WeightLossGainQty,@RateInLBS,@ProductionLossQty,@ActualDeliveryQty,@ReadyStockInhand,@ColorName,@LabLabDipID,@ReturnQty,@EWYDLRelabNo,@EWYDLColorNo,@ShadeFromOrder
END--2
CLOSE Cur_AB1
DEALLOCATE Cur_AB1
SELECT * FROM #TempTableOne Order By OrderID
--Group By Product
SELECT ProductID,ProductName, YarnCount, SUM(PIQty) as PIQty, SUM(ChangingQty) AS ChangingQty, SUM(SampleAdjQty) AS SampleAdjQty, SUM(SampleAdjValue) as SampleAdjValue, SUM(DyeingOrderQty) as DyeingOrderQty,SUM(JobOrderQty)AS JobOrderQty,SUM(ProductionPipeLineQty)as ProductionPipeLineQty,SUM(ProductionFinishedQty) as ProductionFinishedQty,SUM(DeliveryQty)as DeliveryQty,SUM(ProductionGraceQty)AS ProductionGraceQty,SUM(WeightLossGainQty) as WeightLossGainQty,SUM(ProductionLossQty)as ProductionLossQty,SUM(ActualDeliveryQty)as ActualDeliveryQty,SUM(ReadyStockInhand)as ReadyStockInhand, SUM(ReturnQty) AS ReturnQty,SUM(YetToDelivery)AS YetToDelivery,SUM(StockInHand)AS StockInHand,SUM(YetToProduction)AS YetToProduction FROM #TempTableOne GROUP BY ProductID,ProductName,YarnCount Order By ProductID
--Group By Factory
SELECT FactoryID,FactoryName,SUM(PIQty) as PIQty, SUM(ChangingQty) AS ChangingQty, SUM(SampleAdjQty) AS SampleAdjQty, SUM(SampleAdjValue) as SampleAdjValue, SUM(DyeingOrderQty) as DyeingOrderQty,SUM(JobOrderQty)AS JobOrderQty,SUM(ProductionPipeLineQty)as ProductionPipeLineQty,SUM(ProductionFinishedQty) as ProductionFinishedQty,SUM(DeliveryQty)as DeliveryQty,SUM(ProductionGraceQty)AS ProductionGraceQty,SUM(WeightLossGainQty) as WeightLossGainQty,SUM(ProductionLossQty)as ProductionLossQty,SUM(ActualDeliveryQty)as ActualDeliveryQty,SUM(ReadyStockInhand)as ReadyStockInhand, SUM(ReturnQty) AS ReturnQty,SUM(YetToDelivery)AS YetToDelivery,SUM(StockInHand)AS StockInHand,SUM(YetToProduction)AS YetToProduction FROM #TempTableOne GROUP BY FactoryID,FactoryName
--Group By Order
SELECT OrderID,OrderNumber,LCNo,FactoryID,FactoryName,BuyerID,BuyerName,SUM(PIQty) AS PIQty,SUM(ChangingQty) AS ChangingQty,SUM(SampleAdjQty) AS SampleAdjQty,SUM(SampleAdjValue) AS SampleAdjValue,MKTPersonID,MKTPersonName,MerchandiserID,MerchandiserName,AmendmentStatus,Acceptance,Maturity,SUM(DyeingOrderQty) as DyeingOrderQty,SUM(JobOrderQty)AS JobOrderQty,SUM(ProductionPipeLineQty)as ProductionPipeLineQty,SUM(ProductionFinishedQty) as ProductionFinishedQty,SUM(DeliveryQty)as DeliveryQty,SUM(ProductionGraceQty)AS ProductionGraceQty,SUM(WeightLossGainQty) as WeightLossGainQty,SUM(ProductionLossQty)as ProductionLossQty,SUM(ActualDeliveryQty)as ActualDeliveryQty,SUM(ReadyStockInhand)as ReadyStockInhand, SUM(ReturnQty) AS ReturnQty,SUM(YetToDelivery)AS YetToDelivery,SUM(StockInHand)AS StockInHand,SUM(YetToProduction)AS YetToProduction FROM #TempTableOne GROUP BY OrderID,OrderNumber,OrderNumber,LCNo,FactoryID,FactoryName,BuyerID,BuyerName,MKTPersonID,MKTPersonName,MerchandiserID,MerchandiserName,AmendmentStatus,Acceptance,Maturity
--Default View
SELECT OrderID,OrderNumber,LCNo,FactoryID,FactoryName,BuyerID,BuyerName,ProductID,ProductName,YarnCount,PIQty,ChangingQty,SampleAdjQty,SampleAdjValue,RateInLBS,MKTPersonID,MKTPersonName,MerchandiserID,MerchandiserName,AmendmentStatus,Acceptance,Maturity, SUM(DyeingOrderQty) as DyeingOrderQty,SUM(JobOrderQty)AS JobOrderQty,SUM(ProductionPipeLineQty)as ProductionPipeLineQty,SUM(ProductionFinishedQty) as ProductionFinishedQty,SUM(DeliveryQty)as DeliveryQty,SUM(ProductionGraceQty)AS ProductionGraceQty,SUM(WeightLossGainQty) as WeightLossGainQty,SUM(ProductionLossQty)as ProductionLossQty,SUM(ActualDeliveryQty)as ActualDeliveryQty,SUM(ReadyStockInhand)as ReadyStockInhand, SUM(ReturnQty) AS ReturnQty,SUM(YetToDelivery)AS YetToDelivery,SUM(StockInHand)AS StockInHand,SUM(YetToProduction)AS YetToProduction FROM #TempTableOne GROUP BY OrderID,OrderNumber,LCNo,FactoryID,FactoryName,BuyerID,BuyerName,ProductID,ProductName,YarnCount,PIQty,ChangingQty,SampleAdjQty,SampleAdjValue,RateInLBS,MKTPersonID,MKTPersonName,MerchandiserID,MerchandiserName,AmendmentStatus,Acceptance,Maturity
DROP TABLE #TempTableOne
END--1
COMMIT TRAN
答案 0 :(得分：1)
这里有很多问题。正确编写后，此程序应在约15秒内舒适地运行，具体取决于您的索引。在深入研究细节之前，我可以给你的提示如下：
首先，在进行批量处理时唯一可以使用游标的方法是在批量处理中对更新进行分区。换句话说，永远不要使用需要迭代的游标来更新每个记录。整个过程需要迭代500,000次，这将是非常缓慢的。而是使用临时表将数据插入，然后使用该表执行更新。可以使用临时索引索引临时表，如下面的代码所示。确保为临时表和实时表索引WHERE子句中使用的任何字段。
CREATE TABLE #Temp2 (
ProductionTracingUnitID int,
OrderID int,
OrderType smallint,
ProductID int,
DyeingOrderQty decimal(30, 17),
JobOrderQty decimal(30, 17),
ProductionPipeLineQty decimal(30, 17),
ProductionFinishedQty decimal(30, 17),
BuyerID int,
FactoryID int,
ProductionGraceQty decimal(30, 17),
WeightLossGainQty decimal(30, 17),
RateInLBS decimal(30, 17),
ProductionLossQty decimal(30, 17),
ActualDeliveryQty decimal(30,17),
ReadyStockInhand decimal(30, 17),
ColorName varchar(255),
LabLabDipID int,
ReturnQty decimal(30, 17),
EWYDLRelabNo varchar(100),
EWYDLColorNo varchar(100),
ShadeFromOrder smallint
)
CREATE NONCLUSTERED INDEX #IX_Temp2_1 ON #Temp2(ProductionTracingUnitID)
CREATE NONCLUSTERED INDEX #IX_Temp2_2 ON #Temp2(OrderID)
CREATE NONCLUSTERED INDEX #IX_Temp2_3 ON #Temp2(ProductID)
DECLARE @SQL as varchar(MAX)
SET @SQL=
'
SELECT ProductionTracingUnitID,OrderID,OrderType,ProductID,DyeingOrderQty,JobOrderQty,ProductionPipeLineQty,ProductionFinishedQty,BuyerID,FactoryID,ProductionGraceQty,
WeightLossGainQty,RateInLBS,ProductionLossQty,ActualDeliveryQty,ReadyStockInhand,ColorName,LabLabDipID,ReturnQty,EWYDLRelabNo,EWYDLColorNo,ShadeFromOrder
FROM ProductionTracingUnit '+@SQLForPTU
INSERT INTO #Temp2 (ProductionTracingUnitID, OrderID, OrderType, ProductID, DyeingOrderQty, JobOrderQty, ProductionPipeLineQty,
ProductionFinishedQty, BuyerID, FactoryID, ProductionGraceQty, WeightLossGainQty, RateInLBS, ProductionLossQty, ActualDeliveryQty,
ReadyStockInhand, ColorName, LabLabDipID, ReturnQty, EWYDLRelabNo, EWYDLColorNo, ShadeFromOrder)
EXEC (@SQL)
接下来，在进行批量处理时，请避免使用每行需要执行的子查询。以下几行在最好的时候会很慢：
SELECT @LCID=ISNULL(ExportLCID,0), @LCNo=ISNULL(ExportLCNo,''),@AmendmentStatus=AmendmentStatus,@ExportLCValue=Amount
FROM ExportLC WHERE ExportLCID =(SELECT LCID FROM [PI] WHERE PIID=(SELECT PIID FROM Job WHERE JobID=@OrderID))
考虑使用连接重新构造，如下所示：
SELECT @LCID=ISNULL(ExportLCID,0), @LCNo=ISNULL(ExportLCNo,''),@AmendmentStatus=AmendmentStatus,@ExportLCValue=Amount
FROM ExportLC e, [PI] p, Job j
WHERE e.ExportLCID = p.LCID
AND p.PIID = j.PIID
AND j.JobID = @OrderID
不使用游标重写过程，这看起来更像是：
UPDATE #Temp2 SET LCID = ISNULL(ExportLCID, 0), LCNo = ISNULL(ExportLCNo, 0), ...
FROM #Temp2 t, ExportLC e, [PI] p, Job j
WHERE e.ExportLCID = p.LCID
AND p.PIID = j.PIID
AND j.JobID = t.OrderID
要使这一切全部有效，还有很多工作要做，而且我很难为这样的复合过程创建测试环境。但是，我认为这应该足以让你继续下去。如果你遇到困难，请告诉我。
答案 1 :(得分：0)
您可以使用SQL Server中的执行计划来识别瓶颈。 另请尽量避免使用游标，如果临时表包含大量数据，请创建普通表而不是创建#table
答案 2 :(得分：0)
如果要解析500,000行，则游标不起作用。这将导致各种问题，随着数据的增长，它将变得越来越慢。有几种方法可以实现更好的性能。
1）如果可能，请在一夜之间获取数据 - 即使用SQL作业将数据展平为快照表
2）在批处理选择中获取尽可能多的数据 - 即不是在循环中逐行插入临时表，而是可以进行查询以获取特定列所需的所有数据
3）如果你不能在一夜之间做到这一点并且必须一直这样做，我建议将其分解为谨慎的存储过程并从C＃代码中循环。这样您就可以向用户提供反馈 - 也许以进度条的形式提供。这不会超时，如果用户意识到正在计算某些东西，它会花多长时间并不重要，他们会大致了解他们需要等待多长时间，并且如果他们有机会退出想要。