Need help with a query

From: Davey, Alan <>
Date: Fri, 29 Feb 2008 08:36:35 -0500
Message-ID: <>


I have the following data:
>select min(start_air_date) start_date, max(end_air_date) end_date
, count(*) num_units
from br_bbdef_unit
where brdbuy_def_id = 352864
group by start_air_date, end_air_date
order by 1;


--------- --------- ----------
07-JAN-08 11-JAN-08          1
14-JAN-08 18-JAN-08          1
21-JAN-08 25-JAN-08          1
28-JAN-08 01-FEB-08          1
04-FEB-08 08-FEB-08          3
11-FEB-08 15-FEB-08          1
18-FEB-08 22-FEB-08          1
25-FEB-08 29-FEB-08          1
03-MAR-08 07-MAR-08          1
10-MAR-08 14-MAR-08          1

What I would like to do is to group consecutive dates with the same number of units together to get their min/max values. So in this case I would end up with 3 records:

Start Date	End Date	Units/Wk
07-jan-08	01-feb-08	1
04-feb-08	08-feb-08	3
11-feb-08	14-mar-08	1

I'm thinking analytic functions may help here, but I haven't been able to figure out a query to produce the desired output.

Any help would be greatly appreciated.


Alan Davey
Senior Developer
Advertising Systems Group
Harris Corporation, Broadcast Communications 4 Century Drive
Parsippany, NJ 07054
Received on Fri Feb 29 2008 - 07:36:35 CST

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