如何在SQL Server的一个存储过程中执行两个选择查询

Question

我试图在一个存储过程中执行两个选择查询。但是它没有给我任何输出。没有错误，但记录未显示。

首先，我尝试了此存储过程

CREATE PROCEDURE [dbo].[Sp_PriceList_Die_Wise]
@DieNo As Nvarchar(15),
@MetalCode As Int
AS
BEGIN
Select CP.BatchQty,CP.CastingPrice,U.UNITName As 'Unit',MachPrice,U.UNITName As 'M/C Unit' from CustomerPriceList As CP Left Outer Join UNITMaster As U On CP.MUNITID=U.UNITID where MOULDCODE=@DieNo And METALCODE=@MetalCode

SELECT TOP (10) SubOADetail.OANO, SubOADetail.ID, SubOADetail.QTY, SubOADetail.RATE, UNITMaster.UNITName As Unit, OATest.MachPrices, UNITMaster_1.UNITName AS Unit FROM UNITMaster AS UNITMaster_1 RIGHT OUTER JOIN OATest ON UNITMaster_1.UNITID = OATest.MachUnitID RIGHT OUTER JOIN SubOADetail LEFT OUTER JOIN UNITMaster ON SubOADetail.UNIT = UNITMaster.UNITID ON OATest.ID = SubOADetail.ID AND OATest.OANO = SubOADetail.OANO LEFT OUTER JOIN OADetails ON SubOADetail.OANO = OADetails.OANO WHERE SubOADetail.MOULDCODE = @DieNo AND SubOADetail.METALCODE =@MetalCode  ORDER BY OADetails.OADATE DESC
END

这给了我这样的输出

但是我想要在单个表中输出，所以我创建了这个存储过程

CREATE PROCEDURE [dbo].[Sp_PriceList_Die_Wise]
@DieNo As Nvarchar(15),
@MetalCode As Int
AS
BEGIN
WITH main AS 
(
  Select CP.BatchQty,CP.CastingPrice,U.UNITName As 'Unit',
  MachPrice,U.UNITName As 'M/C Unit' from CustomerPriceList As CP 
  Left Outer Join UNITMaster As U On CP.MUNITID=U.UNITID 
  where MOULDCODE=@DieNo And METALCODE=@MetalCode
), sub AS
(
  SELECT TOP (10) SubOADetail.OANO, SubOADetail.ID, SubOADetail.QTY, SubOADetail.RATE, 
  UNITMaster.UNITName As Unit, OATest.MachPrices, UNITMaster_1.UNITName AS MCUnit 
  FROM UNITMaster AS UNITMaster_1 RIGHT OUTER JOIN OATest ON UNITMaster_1.UNITID = OATest.MachUnitID 
  RIGHT OUTER JOIN SubOADetail LEFT OUTER JOIN UNITMaster ON SubOADetail.UNIT = UNITMaster.UNITID 
  ON OATest.ID = SubOADetail.ID AND OATest.OANO = SubOADetail.OANO LEFT OUTER JOIN OADetails 
  ON SubOADetail.OANO = OADetails.OANO WHERE SubOADetail.MOULDCODE = @DieNo 
  AND SubOADetail.METALCODE =@MetalCode  ORDER BY OADetails.OADATE DESC
)
SELECT * 
  FROM main m join sub s
    ON m.MachPrice = s.MachPrices
END

但这给我这样的空白记录

Answer 1

您正在使用revoke()，并且您的第一个表（主表）没有任何记录，因此您将不会获得任何输出。

如果即使主记录中不存在匹配记录，也要从其他表中进行选择，则需要将INNER JOIN更改为JOIN，如下所示。

RIGHT JOIN

编辑：

SELECT * FROM main m right join sub s ON m.MachPrice = s.MachPrices 将适用于提供的样本数据，以防万一，如果您拥有左CTE的数据在右CTE中没有匹配的记录，反之亦然，而您仍想选择记录，那么在这种情况下，需要RIGHT JOIN和LEFT JOIN的组合，为此，您可以像下面这样使用RIGHT JOIN。

FULL OUTER JOIN