You can store an IP address in an INT UNSIGNED (4 bytes) which is of course much more efficient and faster than a CHAR(15). MySQL has two built-in functions: INETATON() and INETNTOA(). These two functions are used allover the place in any TCP/IP stack implementation or even application. The INETATON() function converts Internet addresses from the numbers-and-dots notation into a 32-bit unsigned integer, and INETNTOA() does the opposite.
- SELECT INET_ATON('192.168.0.10') AS ipn;
- SELECT INET_NTOA(3232235530) AS ipa;
- INSERT INTO tbl VALUES (..., INET_ATON('192.168.0.10'), ...);
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