使用未来数据超出范围值时的情况

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导致超出范围值。

如何使用未来的日期？

Answer 1

所以，你有无效的日期二月

我想看看EOMONTH（月底）功能https://msdn.microsoft.com/en-us/library/hh213020.aspx

所以你可以通过在本月1日和SQL将制定出其余。