Effective ip->location query

问题:

I have two tables: one is ip_group_city from ipinfodb.com containing ip_start numbers for determining location of IPs, and other is "visits" with information about web site visitor containing column 'ip'.

I need to select top 10 region_code (from ip_group_city) by checking region_code for each IP from "visits" table.

Right now I'm loading all IPs from "visits" into an array and using that IP info to query the ip_group_city by:

SELECT region_code
FROM ip_group_city
WHERE ip_start <= INET_ATON(IP_FROM_ARR)
ORDER BY ip_start DESC LIMIT 1

I'm unable to create some sort of nested query to do the job for me, because right now things are a bit slow :) - it takes up to 30s on my laptop xampp (AMD Turion x2 2GHz, running windows 7 ultimate 64bit version)

Here's the table with IP addresses (visits)

CREATE TABLE IF NOT EXISTS `visits` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`clientid` mediumint(8) unsigned NOT NULL,
`ip` varchar(15) NOT NULL,
`url` varchar(512) NOT NULL,
`client_version` varchar(64) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=49272 ;

Thanks

回答1:

Since you said other solutions are welcomed...

You might want to check out MaxMind. They have good country and city lookups by IP. You can install an Apache or PHP plugin to make it fast - don't even have to handle the database yourself.

回答2:

To index your table:

ALTER TABLE `ip_group_city` ADD INDEX ( `ip_start` )

To get the top 10 region_codes:

SELECT igc.region_code
FROM ip_group_city igc
JOIN visits v ON igc.ip_start = v.ip
GROUP BY igc.region_code
ORDER BY COUNT(*) DESC
LIMIT 10

回答3:

ALTER TABLE `ip_group_city` ADD INDEX ( `ip_start` )

thats all i'm saying. be sure to use btree and not hash :D

回答4:

You might want to check this post:

Location from ip address