norman100 Posted February 27, 2006 Share Posted February 27, 2006 Hi there guysI need a basic query written for me, I can write it as a nested query but my version of mysql doesnt support it,Ive got 2 tables , the names and fields are below1)tables ( table_id, seats, smoking)table_id is auto-increment , seats hold a whole number , smoking holds yes or no2)newbooking(booking_id, table_id, username, date, time, period);booking_id is the primary key autoincrement table_id is the foreign key from the tables tableusername is varchardate holds the date as a unix time stamptime holds the time as a timestampperiod holds a string either lunch or dinner Query !! Im so sorry for the bother !I need to return all of fields within the tables table, where table.table_id is not equal to the newbooking.table.id for a given date and period.so basically all of the tables from the tables table, which are not present within the booking table for a given date and period,.I dunno guys is the above clear, can anyone help me sort this out, sorry for the bother !Thanks for your helpN Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/ Share on other sites More sharing options...
fenway Posted February 27, 2006 Share Posted February 27, 2006 Why don't you post the nested query that you have written already? Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/#findComment-12832 Share on other sites More sharing options...
norman100 Posted February 27, 2006 Author Share Posted February 27, 2006 [!--quoteo(post=349971:date=Feb 27 2006, 03:54 PM:name=fenway)--][div class=\'quotetop\']QUOTE(fenway @ Feb 27 2006, 03:54 PM) [snapback]349971[/snapback][/div][div class=\'quotemain\'][!--quotec--]Why don't you post the nested query that you have written already?[/quote]Hi there thank you for your message, the nested query i think would be something along the lines SELECT * FROM tables WHERE table_id /= (SELECT table_id FROM newbooking where date = $date && period = $perid)$date holds the specified date period holds the specified periodMaybe the not equals should be not like as the query could return more then one row!Thanks guys Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/#findComment-12837 Share on other sites More sharing options...
fenway Posted February 27, 2006 Share Posted February 27, 2006 Try the following (UNTESTED):[code]SELECT t.table_id FROM tables AS t LEFT JOIN newbooking AS n ON t.table_id = n.table_id WHERE n.table_id IS NULL OR ( n.date <> $date AND n.period <> $period )[/code]Hope that helps. Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/#findComment-12845 Share on other sites More sharing options...
norman100 Posted February 27, 2006 Author Share Posted February 27, 2006 Hi there I tryed that query it gave me a syntax error any ideas Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/#findComment-12860 Share on other sites More sharing options...
wickning1 Posted February 27, 2006 Share Posted February 27, 2006 ...which syntax error? Was it a PHP error? MySQL? Did it give you any more information? Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/#findComment-12869 Share on other sites More sharing options...
norman100 Posted February 27, 2006 Author Share Posted February 27, 2006 [!--quoteo(post=350031:date=Feb 27 2006, 05:46 PM:name=wickning1)--][div class=\'quotetop\']QUOTE(wickning1 @ Feb 27 2006, 05:46 PM) [snapback]350031[/snapback][/div][div class=\'quotemain\'][!--quotec--]...which syntax error? Was it a PHP error? MySQL? Did it give you any more information?[/quote]No it didnt im sorry , Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/#findComment-12873 Share on other sites More sharing options...
fenway Posted February 27, 2006 Share Posted February 27, 2006 I'm sure that it can -- make sure you use mysql_error() to trap them. Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/#findComment-12887 Share on other sites More sharing options...
norman100 Posted February 28, 2006 Author Share Posted February 28, 2006 Warning: mysql_query(): supplied argument is not a valid MySQL-Link resource in c:\project\htdocs\hotel\customer\book.php on line 80Warning: mysql_errno(): supplied argument is not a valid MySQL-Link resource in c:\project\htdocs\hotel\customer\book.php on line 82Warning: mysql_error(): supplied argument is not a valid MySQL-Link resource in c:\project\htdocs\hotel\customer\book.php on line 82Im just lost, do you think it could be something to do with the fact that table_id is a primary key auto increment thanks Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/#findComment-12906 Share on other sites More sharing options...
fenway Posted February 28, 2006 Share Posted February 28, 2006 Sounds like the DB connection failed... hence the query didn't work either. Quote Link to comment https://forums.phpfreaks.com/topic/3703-hi-guys-could-you-help-me-write-a-join-query/#findComment-12933 Share on other sites More sharing options...
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