[步骤]

declare @IsFactoryDirectDeliveryOrder bit=?,@CustomerID int=1


UPDATE sp SET sp.IsFactoryDirectDeliveryOrder=@IsFactoryDirectDeliveryOrder

FROM RB_Procurement_List sp(NOLOCK)                                              

INNER JOIN RB_Procurement_Order_PositionCode pop(NOLOCK) ON sp.P_Code=pop.P_Code AND sp.CustomerID=pop.CustomerID                                              
INNER JOIN RB_OrderInfo_BeikuExpand(NOLOCK) ob ON pop.OrderCode=ob.OrderCode AND pop.CustomerID=ob.CustomerID                                              
WHERE ob.RestockType=2 AND sp.CustomerID=@CustomerID AND ISNULL(sp.IsFactoryDirectDeliveryOrder,0)=0;                                               


UPDATE sp SET sp.IsFactoryDirectDeliveryOrder=1,FactoryDirectDeliveryProductNumber=b.sumProductNum 

FROM RB_Procurement_Detail sp(NOLOCK)                                              
INNER JOIN (SELECT pop.P_Code,pop.SKU,pop.CustomerID,SUM(pop.ProductNum+ProductNumUpdate) sumProductNum FROM RB_Procurement_Order_PositionCode pop(NOLOCK)                                              
INNER JOIN RB_OrderInfo_BeikuExpand  ob(NOLOCK) ON pop.OrderCode=ob.OrderCode AND pop.CustomerID=ob.CustomerID                                              WHERE pop.CustomerID=@CustomerID AND ob.RestockType=2                                              GROUP BY pop.CustomerID,pop.P_Code,pop.SKU) b on b.CustomerID=sp.CustomerID AND b.SKU=sp.SKU AND b.P_Code=sp.P_Code                                                
WHERE  sp.CustomerID=@CustomerID  AND ISNULL(sp.IsFactoryDirectDeliveryOrder,0)=0;

[结果]

[期望]

把语句都拆分成 多个 SQL ，一个一个的执行。 先获取 需要更新的主键 数据 ， 再通过 此主键去 更新 对应的数据值