Time difference report using date range

Question

Hi,
I would like to know a clue as below in the same thread as it is more relavant to this, if you do not mind.
I have one more query using the same table and set of data for one of the report.
Here the the column call_date is timestamp.
Calls by n min interval
Parameters should be startDate and endDate.
This is actually 2 queries. The simplest one, should return a list of games with the start and end time, similar to previous report.
The second, should return number of calls every n minutes interval. So, if n is 1, should return something like this:
Period     Calls
starting (Nos.)
21:00     34
21:01     42
21:02     55
22:58     88
22:59     63
Ideally, the number of minutes in an interval should be dynamic, (can be passed as a parameter).
Many thanks in advance.
Jayesh
Please find the attached script for generating table and populating data.
create table calls
2 as
3 select 441132394629 cli, to_date('02102006 17:30','ddmmyyyy HH24:MI') call_date from dual union all
4 select 441132394629, to_date('05102006 17:00','ddmmyyyy HH24:MI ') from dual union all
5 select 441132533793, to_date('04102006 14:30','ddmmyyyy HH24:MI ') from dual union all
6 select 441132533793, to_date('05102006 12:20','ddmmyyyy HH24:MI ') from dual union all
7 select 441142373223, to_date('04102006 10:30','ddmmyyyy HH24:MI ') from dual union all
8 select 441142373223, to_date('05102006 13:50','ddmmyyyy HH24:MI ') from dual union all
9 select 441227763301, to_date('02102006 16:30','ddmmyyyy HH24:MI ') from dual union all
10 select 441227763301, to_date('04102006 11:20','ddmmyyyy HH24:MI ') from dual union all
11 select 441227763301, to_date('05102006 17:20','ddmmyyyy HH24:MI ') from dual union all
12 select 441227763301, to_date('08102006 17:30','ddmmyyyy HH24:MI ') from dual
13 /

Answer 1

Have you see my answer in Re: Total call Date  report using increment date ?<br>
<br>
Nicolas.