Question

我的SQL代码如下所示。我遇到的问题首先是子查询。结果显示错误：

SQL错误：子查询返回的值超过1。这是不允许的当子查询跟随=，！=，＆lt;，＆lt; =，＆gt;，＆gt; =或子查询是用作表达式

需要显示日期大于（或等于）ESource = Detail的日期的行 - 行需要在某些列中求和，而在其他列中选择单个值。

使用的代码：

select DISTINCT 
  A.Policy, 
  A.Fund, 
 (SUM(A.AddUnits)) AS SUM,
 ((C.TotalUnits - (SUM(A.AddUnits))) * A.Price) AS Value, 

Inner JOIN TableC C
ON C.PolicyNumber = A.PolicyNumber 

where A.PolicyNumber = '120' AND C.NumberOfUnits > 0 AND C.InvestmentFund = A.InvestmentFund 

AND A.DateOfEntry < DATEADD(year, -1, GetDate())
AND A.DateOfEntry >= (Select DateOfEntry FROM TableA AS D where D.ESource = 'Detail') 
AND A.UnitPrice = (Select UnitPrice FROM TableA AS E where E.ESource = 'Detail')

ORDER BY IH.DateOfEntry DESC

表格是：

表A：

政策基金单位价格资源日期

120 BR 6 0.74 RE 2015

120 BR -100 0.72详情2014

120 BR 6 0.71 RE 2013

表C：

政策基金TotalUnits

120 BR 400

期望的结果：

政策基金总和价值

120 BR [6 +（ - 100）] = -94 0.72 [（400 +（ - 94））* 0.72] = 220.32

除了子查询问题之外 - 获取price = 0.72 [where ="Detail"]的命令正在停止发生Sum = -100而不是-94

的两行的总和

非常感谢任何有关错误的帮助

Answer 1

问题出在你的where条款中：

where A.PolicyNumber = '120' AND
      C.NumberOfUnits > 0 AND
      C.InvestmentFund = A.InvestmentFund  AND
      A.DateOfEntry < DATEADD(year, -1, GetDate()) AND
      A.DateOfEntry >= (Select DateOfEntry FROM TableA AS D where D.ESource = 'Detail') AND
      A.UnitPrice = (Select UnitPrice FROM TableA AS E where E.ESource = 'Detail')

最后两个条款是问题所在。解决此问题的一种方法是使用关键字ANY，SOME或ALL：

where A.PolicyNumber = '120' AND
      C.NumberOfUnits > 0 AND
      C.InvestmentFund = A.InvestmentFund  AND
      A.DateOfEntry < DATEADD(year, -1, GetDate()) AND
      A.DateOfEntry >= ALL (Select DateOfEntry FROM TableA AS D where D.ESource = 'Detail') AND
      A.UnitPrice = ALL (Select UnitPrice FROM TableA AS E where E.ESource = 'Detail')

但是，我更喜欢显式聚合：

where A.PolicyNumber = '120' AND
      C.NumberOfUnits > 0 AND
      C.InvestmentFund = A.InvestmentFund  AND
      A.DateOfEntry < DATEADD(year, -1, GetDate()) AND
      A.DateOfEntry >= (Select MAX(DateOfEntry) FROM TableA AS D where D.ESource = 'Detail') AND
      A.UnitPrice = (Select MAX(UnitPrice) FROM TableA AS E where E.ESource = 'Detail')

请注意，您的问题中的查询似乎缺少from子句。条件C.InvestmentFund = A.InvestmentFun应该在on子句中，而不在where子句中。

SQL - 子查询错误和总和错误

1 个答案: