I agree, you should just update it since the standard operation for MYSQL is to only apply updates if the value is changing.
http://dev.mysql.com/doc/refman/5.0/en/update.html "If you set a column to the value it currently has, MySQL notices this and does not update it." Ed -----Original Message----- From: Peter [mailto:[EMAIL PROTECTED] Sent: Saturday, December 09, 2006 3:42 PM To: Nick Meyer Cc: mysql@lists.mysql.com Subject: Re: only update if values different Hello, with good indeces 100 000 rows is basically nothing. Give it a try. Peter Nick Meyer wrote: > What is the best way to UPDATE a row only if values are different? We > have a mainframe extract that literally has 100,000 rows and am worried > about the performance of just running INSERTs each night. > > Is there a simple comparison command or would you have to nest a SELECT > statement? Thank you, > > Nick > > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
