Get date by group by per month basis...

Question

Hello all,
I am trying to write a query where i want the count per month...so for example...the below query
select to_char(date, 'MM/DD/YYYY')
from test
where rownum < 10;
TO_CHAR(date
02/10/2009
02/10/2009
02/10/2009
02/10/2009
02/10/2009
05/31/2009
02/10/2009
so i want a count on the date, but want it per month basis....
select count(*), to_char(date, 'MM/DD/YYYY')
from test
where rownum < 10
group by to_char(date, 'MM/DD/YYYY');
so basically end results should be like below
count(*) date
10 Month1
12 Month2
13 Month3

Answer 1

Hi,
You're GROUPing BY something that changes from day to day.
You need to GROUP BY something that only changes from month to month, like this:
SELECT    COUNT (*)
,        TO_CHAR (dt, 'MM/YYYY')     -- DATE is not a good column name
FROM        test
WHERE       ROWNUM     < 10
GROUP BY  TO_CHAR (dt, 'MM/YYYY')
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only), and also post the results you want from that data.
Explain, using specific examples where the query above is not doing what you want, how you get the correct results from the data you posted.