Sql 在子查询的where中使用主集合的值

我有下面的场景。我有两张桌子需要连接。第一个表是主记录。第二个表是一个多行子记录，需要按降序数据排序，然后只将顶层子记录加入主记录。我唯一能想到的是：

WITH SCD as (select top 100000 Part_Id as PartID, [Date_Created]
      ,[Production_Part_Status_Id]
      ,[Operations_Labor_Rollup]
      ,[Operations_Materials_Rollup]
      ,[Purchased_Subpart_Rollup]
      ,[Production_Subpart_Rollup] from 
   Production_Part_Supplier_Cost_Detail order by Date_Created desc)
SELECT 
     pp.Part_Number 
    ,pp.Part_Name
    ,pp.Revision
    ,pp.EAU_Quantity
    ,pp.Drawing_Number
    ,pp.Net_Weight
    ,pp.Current_Price_Each
    ,pp.Buyer_Stock_Id
    ,pp.Current_Price_Each - 
        (COALESCE(Operations_Labor_Rollup, 0.0) + 
        COALESCE(Operations_Materials_Rollup, 0.0) + 
        COALESCE(Purchased_Subpart_Rollup, 0.0) + 
        COALESCE(Production_Subpart_Rollup, 0.0)) as [variance]
    ,case when pp.Current_Price_Each = 0 or pp.Current_Price_Each IS null then 0 else 
        (COALESCE(Operations_Labor_Rollup, 0.0) + 
        COALESCE(Operations_Materials_Rollup, 0.0) + 
        COALESCE(Purchased_Subpart_Rollup, 0.0) + 
        COALESCE(Production_Subpart_Rollup, 0.0)) / pp.Current_Price_Each end as [Variance Percent]
    ,pp.Variance * pp.EAU_Quantity as [Annualized Variance]
FROM 
    Production_Part AS pp 
left join (SELECT TOP 1 * FROM SCD where Part_Id = PartID) ppscd on ppscd.PartID = pp.Part_Id
WHERE 
    pp.Buyer_Id = @buyer_id;

---

我遇到的问题是子查询中的WHERE不能引用主表的值。如何解决这个问题？

当您的限制

顶部和
顺序出现在不同的位置时，这可能看起来有效，但实际上失败了。我怀疑您将
TOP100000
添加到CTE中是为了“关闭查询优化器”，但实际上您所做的只是隐藏了一个bug

与其使用
TOP
和
orderby
，我们可以使用
行编号（）
：

;WITH SCD as (select Part_Id as PartID, [Date_Created]
      ,[Production_Part_Status_Id]
      ,[Operations_Labor_Rollup]
      ,[Operations_Materials_Rollup]
      ,[Purchased_Subpart_Rollup]
      ,[Production_Subpart_Rollup]
      ,ROW_NUMBER() OVER (PARTITION BY Part_ID
                          ORDER BY Date_Created desc) as rn
   from 
   Production_Part_Supplier_Cost_Detail)
SELECT 
     pp.Part_Number 
    ,pp.Part_Name
    ,pp.Revision
    ,pp.EAU_Quantity
    ,pp.Drawing_Number
    ,pp.Net_Weight
    ,pp.Current_Price_Each
    ,pp.Buyer_Stock_Id
    ,pp.Current_Price_Each - 
        (COALESCE(Operations_Labor_Rollup, 0.0) + 
        COALESCE(Operations_Materials_Rollup, 0.0) + 
        COALESCE(Purchased_Subpart_Rollup, 0.0) + 
        COALESCE(Production_Subpart_Rollup, 0.0)) as [variance]
    ,case when pp.Current_Price_Each = 0 or pp.Current_Price_Each IS null then 0 else 
        (COALESCE(Operations_Labor_Rollup, 0.0) + 
        COALESCE(Operations_Materials_Rollup, 0.0) + 
        COALESCE(Purchased_Subpart_Rollup, 0.0) + 
        COALESCE(Production_Subpart_Rollup, 0.0)) / pp.Current_Price_Each end as [Variance Percent]
    ,pp.Variance * pp.EAU_Quantity as [Annualized Variance]
FROM 
    Production_Part AS pp 
left join SCD ppscd on ppscd.PartID = pp.Part_Id and
                       ppscd.rn = 1
WHERE 
    pp.Buyer_Id = @buyer_id;

完美的你刚刚救了我！