I want to use mysql_affected_rows to determine whether the sql statement is
executed or not found.
If mysql_affected_rows return 0,I take it as not found.
But If I update a value to the value it already was,
(It means if some value is 'test', and in my sql statement I update this
value to 'test')
mysql_affected_rows also return 0, so I take it as not_found,but it is not I
want.
How should I do?
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