MTD numbers using OLAP features of SQL

Question

Hi
I have the following table:
Table_1
app_num,
app_Date
outcome
Table_2
app_num,
app_Status
Here's the query that I am using to get count of applications
SELECT TO_CHAR (a.app_Date, 'Mon-YYYY') AS MTH_Year,
a.outcome,
b.app_status,
COUNT (a.app_num)
FROM table_1 a, table_2 b
WHERE a.app_num = b.app_num
GROUP BY TO_CHAR (a.app_Date, 'Mon-YYYY'), a.outcome, b.app_status
This query will give me month wise count of applications split by outcome and app_status.
Now if I add from_Date, to_date parameters in the following manner:
SELECT TO_CHAR (a.app_Date, 'Mon-YYYY') AS MTH_Year,
a.outcome,
b.app_status,
COUNT (a.app_num)
FROM table_1 a, table_2 b
WHERE a.app_num = b.app_num
AND a.app_Date >= TO_DATE (:Fromdate, 'dd/MON/yyyHH:MI:SS')
AND a.app_date <= TO_DATE (:Fromdate, 'dd/MON/yyyHH:MI:SS')
GROUP BY TO_CHAR (a.app_Date, 'Mon-YYYY'), a.outcome, b.app_status
How can I get MTD numbers using any OLAP features (like partitioning etc.) from the above-mentioned query?
Thanks

Answer 1

Hi,
Perhaps this is what you want:
SELECT    TO_CHAR ( TRUNC (a.app_Date, 'MONTH')
              , 'Mon-YYYY'
            )                    AS MTH_Year
,       a.outcome
,       b.app_status
,       COUNT (a.app_num)               AS month_cnt
,       SUM (COUNT (a.app_num)) OVER ( PARTITION BY  a.outcome
                                        ,            b.add_status
                          ORDER BY      TRUNC (a.app_Date, 'MONTH')
                            )       AS cumm_cnt
FROM      table_1 a
,       table_2 b
WHERE        a.app_num     = b.app_num
AND        a.app_Date     >= TO_DATE (:Fromdate, 'dd/MON/yyyHH:MI:SS')
AND        a.app_date      <= TO_DATE (:Fromdate, 'dd/MON/yyyHH:MI:SS')     -- Did you want :todate here?
GROUP BY  TRUNC (a.app_Date, 'MONTH'')
,            a.outcome
,       b.app_status
--        You may want an ORDER BY clause here
;I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all the tables involved, and the results you want from that data.
Explain, using specific examples, how you get those results from that data. Define any special terms you use, such as "MTD".
Always say what version of Oracle you're using.
You'll get better replies sooner if you always include this information whenever you have a question.