> I have a SQL statement that I use to grab movie profiles. When I > constructed > the input form, I decided I didn't want to use blank entries for > tables that > didn't have a entry for that particular film e.g. a poster wasn't > available > for sale. > > This SQL statement in PHP works fine when EVERY table has an entry for a > title: > $sql="SELECT allposters.allpostersurl, allposters.imageurl, > officialsites.url, profiles.photo, profiles.photoalt, profiles.profile, > soundtracks.title AS cdtitle, soundtracks.asin, soundtracks.coverart, > titles.titlesid, titles.releaseyear, titles.title FROM allposters, > officialsites, profiles, soundtracks, titles WHERE > allposters.titlesid=titles.titlesid AND > officialsites.titlesid=titles.titlesid AND > profiles.titlesid=titles.titlesid > AND soundtracks.titlesid=titles.titlesid AND > profiles.profilesid='$profileid'"; > > Of course, if one table is missing an entry for that film it > turns up empty. > I understand that MySQL (our host is using 3.22.32) doesn't support full > outer joins which is what I think might be needed in this situation. > > Are my choices: > a) code a separate SQL call for each table > b) use a blank entry for the title if no other info exists > > or is there a third way to make that statement work? For those of you who > use PHP, is there any pressing performance reason to use or not to use > choice 'a'?
I think Bob Hall has the answer to your questions. Here's a link to his excellent guide on MySQL SQL: http://users.starpower.net/rjhalljr/MySQL/sql.html / Carsten -- Carsten H. Pedersen keeper and maintainer of the bitbybit.dk MySQL FAQ http://www.bitbybit.dk/mysqlfaq --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
