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我有 mysql 查询，它输出年领先 v 销售额并计算在 2012 年效果很好的转化率，因为它只保存了一年的数据。现在是 2013 年，我需要改变它的工作方式，但已经陷入困境。如果一个潜在客户在 2012 年 12 月出现，然后在 2013 年成为销售，它在我的查询输出中被省略，因为它只要求 2013 年的 CaseDate。

Select
  q.*,
  ROUND(100 * q.Comms / q.Total, 2) As Conversion,
  If(q.Adviser Is Null, 1, 0) As remove
From
  (Select
      a.ContactFullName As Adviser,
      Sum(Year(b.CaseDate) = 2013 And Month(b.CaseDate) = 1) As Jan,
      Sum(Year(b.CaseDate) = 2013 And Month(b.CaseDate) = 2) As Feb,
      Sum(Year(b.CaseDate) = 2013 And Month(b.CaseDate) = 3) As Mar,
      ..... Dec
      Sum(Case
        When Year(b.CaseDate) = 2013 And Month(b.CaseDate) Between '1'
        And '12' Then 1 Else 0 End) As Total,
      Sum(Case When (Year(b.CaseDate) = 2012 Or Year(b.CaseDate) = 2013) And Year(b.StatusSubmittedDate) = ".(int)$_POST['year']." And Month(b.StatusSubmittedDate) Between ".(int)$_POST['start']." And ".(int)$_POST['end']." Then 1 Else 0 End) As Comms
    From
      tblcontacts a Inner Join
      tblcases b On a.ContactID = b.ContactAssignedTo
    Group By
      a.ContactFullName With Rollup) q

这行得通；

Sum(Case When (Year(b.CaseDate) = 2012 Or Year(b.CaseDate) = 2013) And Year(b.StatusSubmittedDate) = 2013 And Month(b.CaseDate) Between '1' And '12'  Then 1 Else 0 End) As Comms

这仅显示 2013 年输入和提交的潜在客户；

Sum(Case When (Year(b.CaseDate) = 2012 Or Year(b.CaseDate) = 2013) And Year(b.StatusSubmittedDate) = ".(int)$_POST['year']." And Month(b.CaseDate) Between ".(int)$_POST['start']." And ".(int)$_POST['end']." Then 1 Else 0 End) As Comms

非常感谢

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1 回答 1

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这取决于您的业务逻辑。如果逻辑说您只显示同一年出现的潜在客户，那么您的代码按原样（原样？）完全正确。如果要包含 2012 或 2013（看起来像您这样做），则需要完整地拼写出来，服务器不理解“2012 或 2013”

Sum(Case When (Year(b.CaseDate) = 2012 Or Year(b.CaseDate) = 2013) And Year(....

注意 Or 语句周围的括号，这是为了确保将CaseYear=2012 or CaseYear=2013 and SubmitYear=2013其视为(CaseYear=2012 or CaseYear=2013) and SubmitYear=2013而不是CaseYear=2012 or (CaseYear=2013 and SubmitYear=2013)

当然，如果业务逻辑不关心 CaseYear，则将其从 Sum 中取出。

于 2013-01-23T16:03:23.843 回答