To update a table called order, where the order number is 3 and you want to set the processed field to YES :-
Using PHP you would use something like :-
$result = mysql_query("update orders set processed=\"YES\" where orderid='3'");
If you want to use the command line for MySQL :-
mysql -u root -p databasename
update orders set processed='YES' where orderid='3';
I hope that helps (And I haven't included a typo)
Regards
Darren
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