获取具有相同IP的用户名引用的所有裁判。会员可以拥有多个帐户

Question

我希望分支机构能够看到他们有多少推荐人。

所以我的表有3列：id，IP，username和referee。会员可以拥有多个帐户。

这是我到目前为止所拥有的。

//Get all of that IP's usernames
$sql = "SELECT username FROM ".MYSQLTABLE." WHERE ip = '" . $_SERVER['REMOTE_ADDR']."'";
$res = mysql_query($sql)or die(mysql_error());

//Select all usernames, who's referee = one of IP's usernames (using above query) 
$sql1 = "SELECT usernames FROM ".MYSQLTABLE." WHERE referee = '".$res."'";
$res1 = mysql_query($sql1)or die(mysql_error());

while($row=mysql_fetch_array($res1))
{

Answer 1

你可以这样做是一个单一的查询，简化了事情：

SELECT DISTINCT(u.username)
FROM yourTable u
INNER JOIN yourTable r ON (r.username = u.referee AND r.ip = 'TheIP');