利用mysql的inet_aton()和inet_ntoa()函数存储IP地址的方

mysql> create table jackbillow (ip int unsigned, name char(1));
Query OK, 0 rows affected (0.02 sec)

mysql> insert into jackbillow values(i_aton('192.168.1.200'), 'A'), (i_aton('200.100.30.241'), 'B');
Query OK, 2 rows affected (0.00 sec)
Records: 2 Duplicates: 0 Warnings: 0

mysql> insert into jackbillow values(i_aton('24.89.35.27'), 'C'), (i_aton('100.200.30.22'), 'D');
Query OK, 2 rows affected (0.00 sec)
Records: 2 Duplicates: 0 Warnings: 0

mysql> select from jackbillow;
+------------+------+
| ip | name |
+------------+------+
| 3232235976 | A |
| 3362004721 | B |
| 408494875 | C |
| 1690836502 | D |
+------------+------+
4 rows in set (0.00 sec)

mysql> select from jackbillow where ip = i_aton('192.168.1.200');
+------------+------+
| ip | name |
+------------+------+
| 3232235976 | A |
+------------+------+
1 row in set (0.00 sec)

mysql> select i_ntoa(ip) from jackbillow;
+----------------+
| i_ntoa(ip) |
+----------------+
| 192.168.1.200 |
| 200.100.30.241 |
| 24.89.35.27 |
| 100.200.30.22 |
+----------------+
4 rows in set (0.00 sec)

当前很多应用都适用字符串char(15)来存储IP地址（占用16个字节），利用i_aton()和i_ntoa()函数，来存储IP地址效率很高，适用unsigned int 就可以满足需求，不需要使用bigint，只需要4个字节，节省存储空间，效率也高很多。

如果IP列有索引，可以使用狼蚁网站SEO优化方式查询

mysql> select i_aton('100.200.30.22');
+----------------------------+
| i_aton('100.200.30.22') |
+----------------------------+
| 1690836502 |
+----------------------------+
1 row in set (0.00 sec)

mysql> select from jackbillow where ip=1690836502;
+------------+------+
| ip | name |
+------------+------+
| 1690836502 | D |
+------------+------+
1 row in set (0.00 sec)

mysql> select i_ntoa(ip),name from jackbillow where ip=1690836502;
+---------------+------+
| i_ntoa(ip) | name |
+---------------+------+
| 100.200.30.22 | D |
+---------------+------+
1 row in set (0.00 sec)

对于LIKE操作，可以使用狼蚁网站SEO优化方式

mysql> select i_ntoa(ip) from jackbillow;
+----------------+
| i_ntoa(ip) |
+----------------+
| 192.168.1.200 |
| 200.100.30.241 |
| 24.89.35.27 |
| 100.200.30.22 |
| 192.168.1.100 |
| 192.168.1.20 |
| 192.168.2.20 |
+----------------+
7 rows in set (0.00 sec)

mysql> select i_aton('192.168.1.0');
+--------------------------+
| i_aton('192.168.1.0') |
+--------------------------+
| 3232235776 |
+--------------------------+
1 row in set (0.00 sec)

mysql> select i_aton('192.168.1.255');
+----------------------------+
| i_aton('192.168.1.255') |
+----------------------------+
| 3232236031 |
+----------------------------+
1 row in set (0.00 sec)

mysql> select i_ntoa(ip) from jackbillow where ip between 3232235776 and 3232236031;
+---------------+
| i_ntoa(ip) |
+---------------+
| 192.168.1.200 |
| 192.168.1.100 |
| 192.168.1.20 |
+---------------+
3 rows in set (0.00 sec)

mysql> select i_ntoa(ip) from jackbillow where ip between i_aton('192.168.1.0') and i_aton('192.168.1.255');
+---------------+
| i_ntoa(ip) |
+---------------+
| 192.168.1.200 |
| 192.168.1.100 |
| 192.168.1.20 |
+---------------+
3 rows in set (0.00 sec)