since the results table is not fully populates, the left outer join is used to
take all the records from the tours table and include any matching records from
the angler_results table. The CASE statement is used to auto fill the result of
the results for that particular record set where there is no value from the
angler_results table
Bastien> Date: Thu, 31 Jan 2008 10:16:23 +0100> From: [EMAIL PROTECTED]> To:
[EMAIL PROTECTED]> CC: php-db@lists.php.net> Subject: Re: [PHP-DB] A little SQL
help> > Not completely sure what type of result you expect, but here's one that
makes sense to me.> > SELECT tour.record_id, tour.event_start_date,
tour.event_end_date, tour.event_name, angler_results.result> FROM tour> LEFT
JOIN angler_results> ON angler_results.tour_id = tour.record_id> AND
angler_results.angler_id = 1> > I've taken out the CASE - I personally never
worked with that and I'd probably put a default value of 'N/A' in the column
angler_results.result. The DISTINCT has to go too, I'm guessing that the
relation tour.record_id -> angler_results.tour_id is 1 -> *. The LEFT join CAN
stay (as far as I know OUTER is only necessary when using ODBC or for
maintaining compatibility with it, and then I'm still not sure what it does),
if you want to have all rows in tour regardless of the join condition with NULL
values for angler_results.result where tour.record_id is not in
angler_results.tour_id. To leave out the NULL values use an INNER JOIN
instead.> > Evert> > > Bastien Koert wrote:> > Hi All,> > > > Got myself stuck
in a little sql here and can't seem to work out what I am doing wrong> > > >
SELECT > > DISTINCT (tour.record_id), tour.event_start_date,
tour.event_end_date, tour.event_name,CASE WHEN result is NULLTHEN 'N/A'ELSE
angler_results.resultEND CASE > > FROM > > tourLEFT OUTER JOIN angler_results >
> ON angler_results.tour_id = tour.record_idWHERE angler_results.angler_id =1>
> > > where the table TOUR is as above in the primary part of the select and
table ANGLER_RESULTS is (record_id, tour_id, angler_id, result)> > > > > > Any
ideas?> > > > Bastien> > > > > > > >
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