Oracle按月滚动或运行总计

Question

目标：每个月末所有语句的滚动/运行总计。

代码：

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电流输出：

MNTH  STMTS 
7/1/2009 1 
10/1/2010 4 
6/1/2011 26 
9/1/2011 211 
10/1/2011 163 
11/1/2011 119 

所需的输出：

MNTH  STMTS 
7/1/2009 1 
10/1/2010 5 
6/1/2011 31 
9/1/2011 242 
10/1/2011 405 
11/1/2011 524 

Answer 1

这听起来像你想运行总计。您可以使用分析SUM函数。

select mnth, 
     sum(stmts) over (order by mnth) stmts 
    from (select TRUNC(ACTHX.STMT_HX_STMT_DATE, 'MM') AS MNTH, 
       COUNT(ACTHX.INVOICE) as STMTS 
      from ACTHX 
     group by TRUNC(ACTHX.STMT_HX_STMT_DATE, 'MM')) 
ORDER BY mnth 

Answer 2

提供相同滚动总数而不带子查询的替代解决方案。

SELECT 
     DISTINCT TRUNC(ACTHX.STMT_HX_STMT_DATE,'MM') AS MNTH 
     ,count(ACTHX.INVOICE) OVER (ORDER BY TRUNC(ACTHX.STMT_HX_STMT_DATE,'MM')) AS STMTS 
    FROM ACTHX 
    ORDER BY 
     TRUNC(ACTHX.STMT_HX_STMT_DATE,'MM')