按日期大于X（天，月，年）的月份对记录进行计数

Question

我想计算最近12个月（包括当月）中按月记录的数量。

直到我们到7月为止，这个工作一直有效，直到将2014年7月和2015年7月的数据合并在一起。

SELECT Max(MonthName(DatePart("m",[FormSentOff]),True)) AS Mth,
       Count(tblDisclosure.ID) AS CountOfID
FROM tblDisclosure
GROUP BY DatePart("m",[FormSentOff])
HAVING (((DatePart("m",[FormSentOff])) Is Not Null)
   AND ((Max(MonthName(DatePart("m",[FormSentOff]),True))) Is Not Null))
ORDER BY Max(tblDisclosure.FormSentOff), Max(MonthName(DatePart("m",[FormSentOff]),True));`

我试图建立一个子查询没有成功，并且还试图以各种方式操纵上面的代码而没有成功。

Answer 1

空运代码：

SELECT 
  Format(Max(FormSentOff),"mmm") as Mth, 
  Count(*) as CountOfRecords
FROM tblDisclosure
WHERE FormSentOff >= DateAdd("m",-11,DateSerial(Year(Date()),Month(Date()),1))
GROUP BY Year(FormSentOff), Month(FormSentOff)
ORDER BY Year(FormSentOff), Month(FormSentOff)