Question

I found this question in regards to grouping a MySQL search by a pattern, but I’m in need of doing this for IP addresses. I need to group IP addresses by the first 3 octets, but I don’t quite see how to accompish this.

Thanks

Answer 1

The MySQL SUBSTRING_INDEX function might be useful here:

drop table if exists test_ip;

create table test_ip
(id int unsigned not null primary key auto_increment,
ip varchar(50) not null,
UNIQUE KEY test_ip_uidx1 (ip));

insert into test_ip (ip) values ('24.21.114.4');
insert into test_ip (ip) values ('24.21.114.5');
insert into test_ip (ip) values ('24.21.114.6');
insert into test_ip (ip) values ('24.21.115.6');
insert into test_ip (ip) values ('24.21.115.7');
insert into test_ip (ip) values ('24.21.115.8');
insert into test_ip (ip) values ('24.21.116.1');

select substring_index(ti.ip,'.',3) as firstThreeOctet,count(*) as ipCount
from test_ip ti
group by substring_index(ti.ip,'.',3);

Hope it helps.