> On Tue, 2005-06-28 at 11:20 -0600, C. Ed Felt wrote:
> > So, in short, (since a paragraph will get confusing):
> >
> > 1. SELECT all records in the CDR table after a requested date
> > (usually
> > 24 hours).
> > 2. Store these records in a huge array.
> > 3. Find all repeats on the 'sessid' field and store this
> in an array.
> > 4. Delete all repeats (save one copy of each repeat CDR).
> >
> > Is there a MySQL query, (version 3), to select all rows
> that have one
> > or more matching rows on a specific field ('sessid')? This would
> > essentially combine steps 1, 2 and 3 in one MySQL query.
>
> I don't believe this is doable in a single query until MySQL 5.
> You /might/ be able to do it in 4.1, but I'm not sure.
>
Sounds to me like you just want distinct records returned. Would
something like this work?:
SELECT MAX(Record1), MAX(Record2), MAX(Etc) FROM CDR GROUP BY sessid
HAVING myDate > RequestedDate;
Or the DISTINCT statement might also do the trick:
SELECT DISTINCT Record1, Record2, Etc FROM CDR WHERE myDate >
RequestedDate;
Jesse
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