在 MySQL 中存储 IP 地址的最有效方法
在 MySQL 中存储和检索 IP 地址的最有效方法是什么?现在我正在做:
What is the most efficient way to store and retrieve IP addresses in MySQL? Right now I'm doing:
SELECT * FROM logins WHERE ip = '1.2.3.4'
其中 ip 是 VARCHAR(15) 字段.
Where ip is a VARCHAR(15) field.
有没有更好的方法来做到这一点?
Is there a better way to do this?
推荐答案
对于 IPv4 地址，您可能想要存储它们作为 int unsigned 并使用 <代码>INET_ATON() 和INET_NTOA() 函数从数值返回 IP 地址，反之亦然.
For IPv4 addresses, you may want to store them as an int unsigned and use the INET_ATON() and INET_NTOA() functions to return the IP address from its numeric value, and vice versa.
示例:
SELECT INET_ATON('127.0.0.1');
+------------------------+
| INET_ATON('127.0.0.1') |
+------------------------+
| 2130706433 |
+------------------------+
1 row in set (0.00 sec)
SELECT INET_NTOA('2130706433');
+-------------------------+
| INET_NTOA('2130706433') |
+-------------------------+
| 127.0.0.1 |
+-------------------------+
1 row in set (0.02 sec)
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