汇总和分析功能

Question

我怎样才能NSR和DSR的每个月的差别，然后为 以下SQL结果的％增加/减少：

type  period  typecount typetotal 
---------------------------------------------- 
DSR   2014-10  88   117 
NSR   2014-10  29   117 
DSR   2014-09  139   363 
NSR   2014-09  224   363 
DSR   2014-08  226   439 
NSR   2014-08  213   439 
DSR   2014-07  181   409 
NSR   2014-07  228   409 
DSR   2014-06  103   321 
NSR   2014-06  218   321 
DSR   2014-05  334   552 
NSR   2014-05  218   552 
DSR   2014-04  188   398 
NSR   2014-04  210   398 
DSR   2014-03  199   447 
NSR   2014-03  248   447 
DSR   2014-02  166   505 
NSR   2014-02  339   505 
DSR   2014-01  294   559 
NSR   2014-01  265   559 

Answer 1

我会建议使用条件聚合得到的一切在一排，然后做在该结构中的工作：

select period, 
     max(case when type = 'DSR' then typecount end) as typecount_dsr, 
     max(case when type = 'NSR' then typecount end) as typecount_nsr, 
     max(typetotal) as typetotal 
from table t 
group by period; 

然后，你可以很容易地做你的计算，是这样的：

with p as (
     select period, 
      max(case when type = 'DSR' then typecount end) as typecount_dsr, 
      max(case when type = 'NSR' then typecount end) as typecount_nsr, 
      max(typetotal) as typetotal 
     from table t 
     group by period 
    ) 
select p.*, (typecount_dsr - typecount_nsr) as diff, 
     (typecount_dsr - typecount_nsr)/lag(typecount_dsr - typecount_nsr) over (order by period) as diffinc 
from p; 

Answer 2

谢谢@ Gordon，@ Mihai这是我尝试过的，现在正在工作。

SELECT DISTINCT SUBSTR(cmse_application_number,1,3) App_Type, 
    TO_CHAR(cmse_created_date,'YYYY-MM') Period, 
    COUNT(SUBSTR(cmse_application_number,1,3)) APP_TYPE_COUNT, 
    SUM(COUNT(SUBSTR(cmse_application_number,1,3))) OVER(PARTITION BY TO_CHAR(cmse_created_date,'YYYY-MM') ORDER BY TO_CHAR(cmse_created_date,'YYYY-MM')) App_MONTH_TOTAL, 
    COUNT(SUBSTR(cmse_application_number,1,3))-lag(COUNT(SUBSTR(cmse_application_number,1,3))) over(PARTITION BY TO_CHAR(cmse_created_date,'YYYY-MM') ORDER BY TO_CHAR(cmse_created_date,'YYYY-MM')) AS NSRDiff , 
    COUNT(SUBSTR(cmse_application_number,1,3))-LEAD(COUNT(SUBSTR(cmse_application_number,1,3))) over(PARTITION BY TO_CHAR(cmse_created_date,'YYYY-MM') ORDER BY TO_CHAR(cmse_created_date,'YYYY-MM')) AS DSRDiff 
FROM 
    (SELECT DISTINCT cmse_service_number, 
    CMSE_APPLICATION_NUMBER, 
    CMSE_CREATED_DATE, 
    cmse_ss_uid 
    FROM cmse_service_enquiry a , 
    cmlt_line_type l, 
    subd_detail s, 
    bst_type t -- links to subd to eliminate failed applications 
    WHERE A.CMSE_CMLT_UID     =L.CMLT_UID 
    AND A.CMSE_BST_UID      =T.BST_UID 
    AND A.CMSE_SERVICE_NUMBER    = S.SUBD_SERVICE_NAME 
    AND SUBSTR(cmse_application_number,1,3) IN ('NSR','DSR') 
    -- AND TO_CHAR(cmse_created_date,'YYYY-MM')='2014-10' -- filter to check specific period 
    AND cmse_ss_uid=58 -- makes sure workflow completes 
) 
GROUP BY SUBSTR(cmse_application_number,1,3) , 
    TO_CHAR(cmse_created_date,'YYYY-MM') 
ORDER BY 2 DESC ;