Question

mysql group by 分组 count 返回值的类型 求大神指教！！

Answer 1

<?php
mysql_connect("localhost","root","root");
mysql_select_db("db");
mysql_query("set names utf8");
$sql = "select count(*),dtime from db_users group by dtime";
$result = mysql_query($sql);
$m = mysql_fetch_assoc($result);
var_dump($m);
?>

打印结果
array (size=2)
'count(*)' => string '25' (length=2)
'dtime' => string '2015-06-20' (length=10)

竟然是string型,保持观望

Answer 2

count 应该是 int