Question

任何人都可以协助我正在尝试编写的sql语句吗？我正在使用SSRS r1（sql或ssrs解决方案很好）

我如何：

按月份和年份显示分数计数
对于这些月中的每一个月，我想计算之前累计的12个月

e.g。

2012 jan: counts feb 2011 - jan 2012
2012 feb: counts mar 2011 - feb 2012
2012 mar: counts apr 2011 - mar 2012

我已经启动了这段代码，但它不正确，但是它让你知道我想要实现的目标（这个问题是我必须从一个日期开始计算月份和年份）

select 
    count(a.measure) count
    ,month(a.StartDate)
    ,year(a.StartDate)
from
    a
where 
    a.StartDate >=  DATEADD(mm,DATEDIFF(mm,0,@datepromt)-12,0) as startdateYrAgo --1st month 1 year ago 01/01/2012 
    and a.StartDate <= DATEADD(s,-1,DATEADD(mm, DATEDIFF(m,0,@datepromt)+1,0)) as startdateEOM --last day of month 31/01/2013
group by 
    month(a.StartDate)
    ,year(a.StartDate)

Answer 1

在这里你有一个查询的想法，它必须看起来像下面;

SELECT 
 periods.year
,periods.month
,measures.cnt
FROM (
    SELECT DISTINCT
      year = YEAR(StartDate)
    , month = MONTH(StartDate)
    , month_running = DATEDIFF(mm, 0, StartDate) 
    FROM a
    GROUP BY YEAR(StartDate), MONTH(StartDate), DATEDIFF(mm, 0, StartDate) 
) periods
JOIN (
    SELECT month_running = DATEDIFF(mm, 0, StartDate), cnt = COUNT(measure) 
    FROM a
    GROUP BY DATEDIFF(mm, 0, StartDate) 
) measures
ON measures.month_running BETWEEN periods.month_running - 12 AND periods.month_running - 1

SQL累积前12个月 - 每月细分

1 个答案: