如何获取最近13个月的数据？

Question

因此，我有这段代码，用于获取最近11个月的销售数据（包括当月），并将其整整一年。 我该怎么做才能将其更改为过去12个月加上当月的数据？ 我知道我必须在右侧（选择时间段）进行更改...但不确定

在这个函数中，左边的函数显示如何将当前年份（2014）减去1得出2013 ..但是我不明白右边的函数，2是什么意思？ 谢谢

period <= (
    SELECT Period 
    FROM dbo.FiscalDates 
    WHERE (Date = CONVERT(varchar(10), GETDATE(), 102))) and period >= (
convert(varchar, left((
    SELECT Period 
    FROM dbo.FiscalDates 
    WHERE (Date = CONVERT(varchar(10), GETDATE(), 102))),4)-1)+'-'+
convert(varchar, right((
    SELECT Period 
    FROM dbo.FiscalDates 
    WHERE (Date = CONVERT(varchar(10), GETDATE(), 102))),2)))
group by prodnum, period, WhseNum

Answer 1

哇，哥们，我想您可能在这里使事情变得过于复杂。 如果您想获取过去X个月的数据，则只需使用DATEADD它是一个非常有用的功能 。

然后您需要做的就是

select
    YourColumns
FROM YourTable
WHERE YourDate >= DATEADD(MONTH, -13, CAST(GETDATE() AS DATE))

ba，你去那里。

Answer 2

        DECLARE 
        @FormYear AS INT,
        @FormMonth AS INT,
        @ToYear AS INT,
        @ToMonth AS INT,
        @FromDate AS DATE,
        @ToDate AS DATE

        SET @FormYear=YEAR(DATEADD(DAY, -365, GETDATE()))
        SET @FormMonth=MONTH(DATEADD(DAY, -365, GETDATE()))

        SET @ToYear=YEAR(GETDATE())
        SET @ToMonth=MONTH(GETDATE())

        SET @FromDate= CAST(CAST(@FormMonth AS VARCHAR) +'-'+'01'+ '-' +CAST(@FormYear AS VARCHAR) AS DATE)
        SET @ToDate= CAST(CAST(@ToMonth AS VARCHAR) +'-' + '01'+'-' + CAST(@ToYear AS VARCHAR) AS DATE)

之后，只需选择-

  YourDateField Between @FormDate AND @ToDate