http://www.mysql.com/documentation/mysql/full/manual_toc.html#Working_with_NULL
On 12 Sep 2002, compo guy wrote: > What is the difference between the following sql queries written > to > >extract tuples with the field amount having non null value: > > select loan_number from loan where amount <> null (It > >returns > >an empty set) > > select loan_number from loan where amount is not null(It > >returns the expected result). > > > > > --------------------------------------------------------------------- > 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 > --------------------------------------------------------------------- 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
