ORACLE SQL:填写缺少的日期 [英] ORACLE SQL: Fill in missing dates

问题描述

我有以下代码，可以为我提供三十天的生产日期和生产量.

I have the following code which gives me production dates and production volumes for a thirty day period.

select 
(case when trunc(so.revised_due_date) <= trunc(sysdate) 
    then trunc(sysdate) else trunc(so.revised_due_date) end) due_date, 
(case 
    when (case when sp.pr_typ in ('VV','VD') then 'DVD' when sp.pr_typ in ('RD','CD') 
    then 'CD' end) = 'CD' 
    and  (case when so.tec_criteria in ('PI','MC') 
    then 'XX' else so.tec_criteria end) = 'OF'
    then sum(so.revised_qty_due)
end) CD_OF_VOLUME
from shop_order so
left join scm_prodtyp sp
on so.prodtyp = sp.prodtyp
where so.order_type = 'MD' 
and so.plant = 'W' 
and so.status_code between '4' and '8' 
and trunc(so.revised_due_date) <= trunc(sysdate)+30
group by trunc(so.revised_due_date), so.tec_criteria, sp.pr_typ
order by trunc(so.revised_due_date)

我的问题是，有没有计划生产的日期，该日期将不会出现在报告中.有没有办法填补缺失的日期.

The problem I have is where there is a date with no production planned, the date wont appear on the report. Is there a way of filling in the missing dates.

即当前报告显示以下内容...

i.e. the current report shows the following ...

DUE_DATE    CD_OF_VOLUME 
14/04/2015     35,267.00 
15/04/2015     71,744.00 
16/04/2015     20,268.00 
17/04/2015     35,156.00 
18/04/2015     74,395.00 
19/04/2015      3,636.00 
21/04/2015      5,522.00
22/04/2015     15,502.00
04/05/2015     10,082.00

注意:缺少日期(2015年4月20日，2015年4月23日至2015年3月5日)

Note: missing dates (20/04/2015, 23/04/2015 to 03/05/2015)

范围从sysdate开始始终为三十天. 您如何填写缺失的日期? 您需要某种日历表吗?

Range is always for a thirty day period from sysdate. How do you fill in the missing dates? Do you need some kind of calendar table?

谢谢

推荐答案

您可以通过以下方式从SYSDATE获取30天期限(我假设您想包含SYSDATE?):

You can get the 30-day period from SYSDATE as follows (I assume you want to include SYSDATE?):

WITH mydates AS (
    SELECT TRUNC(SYSDATE) - 1 + LEVEL AS due_date FROM dual
   CONNECT BY LEVEL <= 31
)

然后使用上面的代码对查询执行LEFT JOIN(将查询放在CTE中也可能不是一个坏主意):

Then use the above to do a LEFT JOIN with your query (perhaps not a bad idea to put your query in a CTE as well):

WITH mydates AS (
    SELECT TRUNC(SYSDATE) - 1 + LEVEL AS due_date FROM dual
   CONNECT BY LEVEL <= 31
), myorders AS (
    select 
    (case when trunc(so.revised_due_date) <= trunc(sysdate) 
        then trunc(sysdate) else trunc(so.revised_due_date) end) due_date, 
    (case 
        when (case when sp.pr_typ in ('VV','VD') then 'DVD' when sp.pr_typ in ('RD','CD') 
        then 'CD' end) = 'CD' 
        and  (case when so.tec_criteria in ('PI','MC') 
        then 'XX' else so.tec_criteria end) = 'OF'
        then sum(so.revised_qty_due)
    end) CD_OF_VOLUME
    from shop_order so
    left join scm_prodtyp sp
    on so.prodtyp = sp.prodtyp
    where so.order_type = 'MD' 
    and so.plant = 'W' 
    and so.status_code between '4' and '8' 
    and trunc(so.revised_due_date) <= trunc(sysdate)+30
    group by trunc(so.revised_due_date), so.tec_criteria, sp.pr_typ
    order by trunc(so.revised_due_date)
)
SELECT mydates.due_date, myorders.cd_of_volume
  FROM mydates LEFT JOIN myorders
    ON mydates.due_date = myorders.due_date;

如果要在缺失"日期显示零而不是NULL，请使用上面的COALESCE(myorders.cd_of_volume, 0) AS cd_of_volume.

If you want to show a zero on "missing" dates instead of a NULL, use COALESCE(myorders.cd_of_volume, 0) AS cd_of_volume above.

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