使用未来数据“超出范围值”的情况

Question

 select  
 sum(A.[usercount1]) as [2015-01]
,Sum(A.[usercount2]) as [2015-02]

from 
(select
startdate 
enddate
when '2015-01-31' > U.startdate and '2015-01-31' < U.enddate then     count(username)
 Else NULL
    End as 'usercount1'
   ,
    Case
  when '2015-02-31' > U.startdate and '2015-02-31' < U.enddate then     count(username)
 Else NULL
 End as 'usercount2' 


 FROM  U

   group by U.enddate, U.startdate, username, contract, u.email, region 

    )A

获取错误：将varchar数据类型转换为日期时间数据类型会导致超出范围的值。

如何使用将来的日期？

Answer 1

所以你有2月的无效日期。

我会看一下EOMONTH（月末）函数https://msdn.microsoft.com/en-us/library/hh213020.aspx

所以你可以在本月的第一天通过，SQL将解决剩下的问题。