How to determine if a MySQL update query succeeded when the data passed in the query is the same as what is already in the database?

Question

Let\'s say you have a form with pre-populated data from your database, and you allow your users to make changes and save the form. If the user clicks the save button without mak

Answer 1

if the update "fails" due to syntax error, or other mysql will return an error code on the actual mysql query and affected_rows will return with yet another error.

Php for example:

$qry = mysql_query("update blah where IamaSyntaxerror,33");
if ($qry === FALSE) { echo "an error has occured"; }

else  { mysql_affected_rows() == 0  means no updates occured