RE: [PHP-DB] SQL conditional UPDATE

Derek, I've found that it's often easiest to do things like this with stored procedures. YMMV, but SPs make my life much easier. HTH, -- Troy Settle Pulaski Networks 540.994.4254 It's always a long day, 86400 doesn't fit into a short > -----Original Message----- > From: Derek Paterson [mailto:d.paterson@craneware.com] > Sent: Thursday, October 12, 2000 11:03 AM > To: PHP Database List; Richard Allsebrook > Subject: Re: [PHP-DB] SQL conditional UPDATE > > > Yes, that's what I've ended up doing (7 at the latest count). I've found > from MS-SQL help, would you believe, that it is possible to have an UPDATE > ... SET field1= (SELECT.. FROM WHERE..) WHERE .. structure but my > brain hurt > too much trying to work it the conditions - I think it would have > had to be > a double embedded SELECT. Creating a temporary table/column was another > option but I've just about got the 7 individual queries written > (less chance > of error) and I've numbered them so I remember what order they've > to be run > in. > > Thanks anyway > > Derek > > ----- Original Message ----- > From: "Richard Allsebrook" <richard.allsebrook@easysoft.com> > To: "Derek Paterson" <d.paterson@craneware.com>; "PHP Database List" > <php-db@lists.php.net> > Sent: Thursday, October 12, 2000 3:50 PM > Subject: RE: [PHP-DB] SQL conditional UPDATE > > > > How about two queries: > > > > UPDATE table SET field1 = "valuea" WHERE condition1 > > UPDATE table SET field1 = "valueb" WHERE NOT condition1 > > > > _____ > > > > ~ Richard Allsebrook ~ > > Applications Developer and Webmaster > > Easysoft Limited, No3 The Embankment, Leeds, LS1 4BJ > > http://www.easysoft.com > > <http://www.easysoft.com> - > http://www.cinema.com > > <http://www.cinema.com> > > "A computer lets you make more mistakes faster than any > invention in human > > history - with the possible exceptions of handguns and tequila." > > > > _____ > > > > > > > > > > > > -----Original Message----- > > From: Derek Paterson [mailto:d.paterson@craneware.com] > > Sent: Thursday, October 12, 2000 2:47 PM > > To: PHP Database List > > Subject: [PHP-DB] SQL conditional UPDATE > > > > > > Is there any way within one SQL query to Update to different values > > dependant on conditions. I've guessed at subqueries but cannot get my > head > > round the syntax and web advice differs dependant on source. > > eg. > > UPDATE table SET field1 = "valuea" WHERE condition1 ELSE field1 > = "valueb" > > > > I know I could build dynamic queries in PHP but this db isn't on the web > > yet - trying to get it into shape to put it there. > > > > TIA > > > > Derek > > > > > > > > -- > > PHP Database Mailing List (http://www.php.net/) > > To unsubscribe, e-mail: php-db-unsubscribe@lists.php.net > > For additional commands, e-mail: php-db-help@lists.php.net > > To contact the list administrators, e-mail: php-list-admin@lists.php.net > > > -- > PHP Database Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-db-unsubscribe@lists.php.net > For additional commands, e-mail: php-db-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net > >