循环遍历记录集并使用结果执行另一个SQL select并返回结果

Question

我对存储过程完全不熟悉.这次,我需要在MS SQL中创建一个存储过程.

假设我有下表.

     Table name: ListOfProducts  
      --------------------------
       SomeID, ProductID  

         34, 4
         35, 8
         35, 11

如何传递SomeID.使用此SomeID从表ListOfProducts中选择记录集.然后遍历此记录集.

假设我传入SomeID = 35.

因此,记录集将返回带有SomeID 35的2条记录.在循环中,我将获得ProductID 8和11,它将用于从另一个表中执行另一个选择.

存储过程应返回第二个选择的结果.

如何在MS SQL存储过程中执行此操作？

对不起,对于这个新手问题.谢谢你的帮助.

Answer 1

如果你想循环记录.你可以这样做:

--Container to Insert Id which are to be iterated
Declare @temp1 Table
(
  tempId int
)
--Container to Insert records in the inner select for final output
Declare @FinalTable  Table
(
  Id int,
  ProductId int
)

Insert into @temp1 
Select Distinct SomeId From YourTable

-- Keep track of @temp1 record processing
Declare @Id int
While((Select Count(*) From @temp1)>0)
Begin
   Set @Id=(Select Top 1 tempId From @temp1)

   Insert Into @FinalTable 
   Select SomeId,ProductId From ListOfProducts Where Id=@Id

   Delete @temp1 Where tempId=@Id
End

Select * From @FinalTable

Answer 2

做这样的事情：

Declare @ID int

SET @ID = 35

SELECT
   p.SomeID
  ,p.ProductID
 FROM ListOfProducts p
  WHERE p.SomeID = @ID
 -----------------------
   --Or if you have to join to get it
  Declare @ID int

  SET @ID = 35

    SELECT
      c.SomeID
      ,p.ProductID
      ,p.ProductName

    FROM ListOfProducts p
    INNER JOIN categories c on p.ProductID = c.SomeID
    WHERE p.SomeID = @ID