Question

I have mysql database with table users. In users there are columns:
id , username , password , ip

I have administration panel and I need to show users that have same ip , like this

User1 → User2

Nick1 → Nick2

etc.

How can i do it with php.Thanks , and this is urgent.Thanks.

Answer 1

Here is your sql query.

SELECT username, list.ip FROM users
INNER JOIN (SELECT ip FROM users
GROUP BY ip HAVING count(id) > 1) dup ON list.ip = dup.ip

For use in PHP:

$sql = "SELECT username, list.ip FROM users
INNER JOIN (SELECT ip FROM users
GROUP BY ip HAVING count(id) > 1) dup ON list.ip = dup.ip";

$result = mysql_query($sql,$con);

while($row = mysql_fetch_array($result))
{
    echo $row['username'];
}

UPDATE:

Try this query instead:

$sql = "SELECT username FROM users WHERE ip in 
(SELECT username FROM users GROUP BY ip HAVING count(ip) > 1)";