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Find Similar IPs in Database


tcollie

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I have the following code for finding exact matches for records in my users table containing the same ip address.

 

SELECT * FROM users WHERE ipaddress IN (SELECT ipaddress FROM users GROUP BY ipaddress HAVING COUNT(*) > 1)

 

This returns a listing of user accounts with the EXACT SAME ip address registered.

 

What I want to also be able to find is records with similar IP addresses.  For an example,

 

127.0.0.1

127.0.0.15

 

would be returned as similar matches.  I currently only want to ensure that the first 3 parts (127.0.0.*) are exact matches and the fourth part of the ip is the wildcard.

 

Can somebody help me out with this or point me in the right direction.

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