mysql数据库数据类型转换函数

MySQL中实现IP地址转换为整数、整数转换为IP地址、十六进制转为十进制、十进制转为十六进制的函数整理如下：

IP地址转换为整数

mysql> SELECT INET_ATON('172.21.10.31');
+---------------------------+
| INET_ATON('172.21.10.31') |
+---------------------------+
|                2887059999 |
+---------------------------+
1 row in set (0.08 sec)

整数转换为IP地址

mysql> SELECT INET_NTOA(2887059999);
+-----------------------+
| INET_NTOA(2887059999) |
+-----------------------+
| 172.21.10.31          |
+-----------------------+
1 row in set (0.00 sec)

十六进制转为十进制

mysql> select CONV('A43BB57',16,10);
+-----------------------+
| CONV('A43BB57',16,10) |
+-----------------------+
| 172211031             |
+-----------------------+
1 row in set (0.06 sec)

十进制转为十六进制

mysql> select CONV('172211031',10,16);
+-------------------------+
| CONV('172211031',10,16) |
+-------------------------+
| A43BB57                 |
+-------------------------+
1 row in set (0.00 sec)

参考原文：mysql中ip和整数的转换