《Mysql必讀利用mysql的inet_aton()和inet_ntoa()函數(shù)存儲IP地址的方法分享》要點：
本文介紹了Mysql必讀利用mysql的inet_aton()和inet_ntoa()函數(shù)存儲IP地址的方法分享，希望對您有用。如果有疑問，可以聯(lián)系我們。

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

mysql> insert into jackbillow values(inet_aton('192.168.1.200'), 'A'), (inet_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(inet_aton('24.89.35.27'), 'C'), (inet_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 = inet_aton('192.168.1.200');
+------------+------+
| ip | name |
+------------+------+
| 3232235976 | A |
+------------+------+
1 row in set (0.00 sec)

mysql> select inet_ntoa(ip) from jackbillow;
+----------------+
| inet_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)

當前很多應用都適用字符串char(15)來存儲IP地址(占用16個字節(jié)),利用inet_aton()和inet_ntoa()函數(shù),來存儲IP地址效率很高,適用unsigned int 就可以滿足需求,不需要使用bigint,只需要4個字節(jié),節(jié)省存儲空間,同時效率也高很多.

如果IP列有索引,可以使用下面方式查詢：

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

對于LIKE操作,可以使用下面方式：

mysql> select inet_ntoa(ip) from jackbillow;
+----------------+
| inet_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 inet_aton('192.168.1.0');
+--------------------------+
| inet_aton('192.168.1.0') |
+--------------------------+
| 3232235776 |
+--------------------------+
1 row in set (0.00 sec)

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

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

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

轉載請注明本頁網(wǎng)址：
http://www.fzlkiss.com/jiaocheng/4982.html