我只是想知道哪种方法最有效,如果我真的只想获得表中的行数.
$res = mysql_query("SELECT count(*) as `number` FROM `table1`");
$count = mysql_fetch_result($res,0,'number');
要么
$res = mysql_query("SELECT `ID` FROM `table1`");
$count = mysql_num_rows($res);
有人做过任何体面的测试吗？