SQL - 从当前日期到 2 年前的日期范围

Question

我是新来的，也是 sql 的菜鸟。我需要有关此逻辑的帮助。我相信问题出在“dateadd”功能中。我需要获取当前日期（2014 年 8 月）到 2 年前（2012 年 8 月）的日期范围。我的一个伙伴说我可以使用 max 函数，但他也不知道该怎么做。不知道该怎么做..请指导我。谢谢！

--count of EDI exceptions daily with current status
select count(InvoiceUniqueness) as [Nbr], CONVERT(varchar(12), ProcessDate, 101) as            [Date],
case currentstatus when 1 then 'production' when 2 then 'exception' when 3 then 'archive'     end as [CurrentStatus]
from PreProcessTransLog
where (CONVERT(DATETIME, ProcessDate, 102)) >= dateadd (yy,-2,getdate()) and  InitialStatus  =2
group by CONVERT(varchar(12), ProcessDate, 101), currentstatus
order by CAST (CONVERT(varchar(12), ProcessDate, 101) as smalldatetime) desc

查询结果：

    6   10/11/2014  production
    12  10/10/2014  production
    3   09/30/2014  production
    2   09/28/2014  production
    34  09/27/2014  production
    39  09/26/2014  production
    150 08/02/2014  exception
    40  08/01/2014  production
    62  08/01/2014  archive
    437 08/01/2014  exception
    60  07/31/2014  production
    54  07/31/2014  archive
    46  07/31/2014  exception
    61  07/30/2014  exception
    113 07/30/2014  production
    98  07/30/2014  archive
    7   07/29/2014  exception
    130 07/29/2014  archive
    80  07/29/2014  production
    84  07/28/2014  production
    ....
    ....
    ....

如您所见，我将在 8 月之后获得日期，例如 9 月和 10 月。我只想当前日期。

谢谢！！

Answer 1

您可以添加 ProcessDate

SELECT  COUNT(InvoiceUniqueness) AS [Nbr] ,
        CONVERT(VARCHAR(12), ProcessDate, 101) AS [Date] ,
        CASE currentstatus
          WHEN 1 THEN 'production'
          WHEN 2 THEN 'exception'
          WHEN 3 THEN 'archive'
        END AS [CurrentStatus]
FROM    PreProcessTransLog
WHERE    CONVERT(DATETIME, ProcessDate, 102)  >= DATEADD(yy, -2, GETDATE())
        AND ProcessDate <= GETDATE()
        AND InitialStatus = 2
GROUP BY CONVERT(VARCHAR(12), ProcessDate, 101) ,
        currentstatus
ORDER BY CAST (CONVERT(VARCHAR(12), ProcessDate, 101) AS SMALLDATETIME) DESC