汇总移动范围和标准，按天分组

Question

我要做的是根据标准和按天分组过去 30 天的总和，一天的代码如下所示：

select
sum(case when f.hire_date__c between '2017-08-01 00:00:00' and '2017-09-01 
00:00:00' 
and t.createddate  between '2017-08-01 00:00:00' and '2017-09-01 00:00:00'
and t.name = 'Request' then 1 else 0 end) as Requests
            from case_task_c as t
            join case_file_c as f
            on f.id = t.case_file__c

我可以根据今天的日期等相应地调整 30 天回顾的日期。我想不通的是每天都有这个查询组，即昨天的结果、前一天等对于调整后的日期范围。

到目前为止，我有这个：

select 
date(cast(f.hire_date__c as date)),
row_number() over (order by f.hire_date__c desc) as rownumber,
rr.Cancels as Cancels,
qq.hires as hires,
sum(rr.Cancels) over (rows between 1 following and 30 following) as 
CumulCancel,
sum(qq.Hires) over (rows between 1 following and 30 following) as Hires
from case_file_c as f
    left join(
            select
            cast(f.hire_date__c as date) as date1,
            sum(case when 
            t.name = 'Cancellation Request' then 1 else 0 end) as Cancels
            from case_task_c as t
            join case_file_c as f
            on f.id = t.case_file__c
            group by date1)
            as rr
            on rr.date1 = cast(f.hire_date__c as date)
    left join(
            select
            cast(f.hire_date__c as date) as date2,
            sum(case when f.hire_date__c is not null then 1 else 0 end) as 
            hires
            from sf_case_file_c as f
            group by date2) as qq
            on qq.date2 = cast(f.hire_date__c as date)
where f.hire_date__c is not null 
and f.hire_date__c >= '2017-01-01 00:00:00'
and f.hire_date__c between date_add('day',-30,current_date) and current_date
group by f.hire_date__c, rr.Cancels, qq.hires
order by f.hire_date__c desc

即使使用“当前日期 - 间隔 -30 天”也只是查找..当前日期。

使用 Postgres 8.0.2

Answer 1

使用 group by 如下。您在列选择中将日期时间转换为日期，但不是在分组中

GROUP BY date(cast(f.hire_date__c as date)),rr.Cancels, qq.hires