php - Find identical IP from database and combine it to one result


I have a table named "ips" that contains all of my users IPs. I want to find duplicated accounts and report it for me. I want to see all users that have the same IP, for example: "a" has the same ip as "b", and "c" has the same ip as "d". So I want to get a query that gets me-

User 1: "a", User 2: "b", ip:
User 1: "c", User 2: "d", ip:

What's the best query to do so? (PHP/Mysql)




How about

select ip, group_concat(user_name) as users
from ips
group by ip
having count(*) > 1

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