Question

我有mysql查询，输出多年的销售额和销售额，并计算2012年的转化率，因为它只持有一年的数据。现在它的2013年我需要改变它的工作方式，但已经陷入困境。如果2012年12月有一个销售线索，然后在2013年成为销售，那么它将从我的查询输出中省略，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

这有效;

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

这显示导致进入＆amp;于2013年提交;

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

Answer 1

这取决于您的业务逻辑。如果逻辑说您只显示同年出现的潜在客户，那么您的代码完全正确（原样？）。如果你想要包括2012年或2013年（你看起来像这样），你需要完全拼写出来，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CaseYear=2012 or CaseYear=2013 and SubmitYear=2013被视为(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，那么将其从Sum中取出。

mysql where子句跨越多年？

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