$rs=MySQL_query($sql);
if(mysql_affected_rows())
echo "sql執行成功";
else
echo "sql執行失敗";

<?php
/* 連接數據庫 */
mysql_pconnect("localhost", "mysql_user", "mysql_passWord") or die ("Could not connect" . mysql_error());
mysql_select_db("mydb");
/* Update 記錄 */
mysql_query("UPDATE mytable SET used=1 WHERE id < 10");
printf ("Updated records: %dn", mysql_affected_rows());
mysql_query("COMMIT");
?>