数据（RS的总和）为多个月每月不同势

Question

我真的很新的sql

这是我的查询：

select rmname, sum(cast (PROPOSEDLIMIT as int)) as january 
from los_ext 
where applicationdate between '01-01-2016' and '01-31-2016' 
group by RMNAME 

我想这对于单个查询每月不使用日期永远都不会有。

我该怎么做？

我希望我的输出：

RMNAME JAN FEB MARCH APRIL .... 
Nitin 2222 3333 33333 34422 333 

其中propsed限制和被取出。

Answer 1

尝试以下查询：

select 
    rmname, 
    sum(CASE WHEN MONTH(applicationDate) = 1 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as january, 
    sum(CASE WHEN MONTH(applicationDate) = 2 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as February, 
    sum(CASE WHEN MONTH(applicationDate) = 3 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as March, 
    sum(CASE WHEN MONTH(applicationDate) = 4 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as April, 
    sum(CASE WHEN MONTH(applicationDate) = 5 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as May, 
    sum(CASE WHEN MONTH(applicationDate) = 6 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as June, 
    sum(CASE WHEN MONTH(applicationDate) = 7 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as July, 
    sum(CASE WHEN MONTH(applicationDate) = 8 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as August, 
    sum(CASE WHEN MONTH(applicationDate) = 9 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as September, 
    sum(CASE WHEN MONTH(applicationDate) = 10 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as October, 
    sum(CASE WHEN MONTH(applicationDate) = 11 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as November, 
    sum(CASE WHEN MONTH(applicationDate) = 12 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as December 
    from los_ext 
    group by RMNAME,MONTH(applicationDate) 

您可以收集一些知识上Pivot Table。

注意：以上查询将总结相同月份的数据，尽管月份可能属于不同年份。

For example 2015 February and 2014 February will be summed up to the same slot.

为了避免这一点，你可以添加一个date range in where clause like you did。

因此增加在该日期范围在where子句查询看起来象下面这样：（节省一些打字，并成为ANSI SQL标准）

select 
    rmname, 
    sum(CASE WHEN MONTH(applicationDate) = 1 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as january, 
    sum(CASE WHEN MONTH(applicationDate) = 2 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as February, 
    sum(CASE WHEN MONTH(applicationDate) = 3 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as March, 
    sum(CASE WHEN MONTH(applicationDate) = 4 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as April, 
    sum(CASE WHEN MONTH(applicationDate) = 5 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as May, 
    sum(CASE WHEN MONTH(applicationDate) = 6 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as June, 
    sum(CASE WHEN MONTH(applicationDate) = 7 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as July, 
    sum(CASE WHEN MONTH(applicationDate) = 8 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as August, 
    sum(CASE WHEN MONTH(applicationDate) = 9 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as September, 
    sum(CASE WHEN MONTH(applicationDate) = 10 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as October, 
    sum(CASE WHEN MONTH(applicationDate) = 11 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as November, 
    sum(CASE WHEN MONTH(applicationDate) = 12 THEN cast (PROPOSEDLIMIT as int) ELSE 0 END) as December 
    from los_ext 
    WHERE applicationdate between '01-01-2016' and '31-12-2016' 
    group by RMNAME,MONTH(applicationDate) 

Answer 2

执行cast和month东西在派生表：

select rmname, 
     sum(case when mnth = 1 then proplim else 0 end) as jan, 
     sum(case when mnth = 2 then proplim else 0 end) as feb, 
     ... 
     sum(case when mnth = 12 then proplim else 0 end) as dec 
from 
(
    select rmname, cast (PROPOSEDLIMIT as int) proplim, MONTH(applicationDate) mnth 
    from los_ext 
    where applicationdate between '01-01-2016' and '01-31-2016' 
) dt 
group by RMNAME