mysql查询ip地址段时注意的问题
无 由于前期设计问题，在保存ip地址时，没有存为整型，而是存成了字符串形式，在查询ip的范围区间时，遇到这样的问题：select ip from t_ip where ip between '192.168.11.1' and '192.168.11.150' ，当末尾ip地址最后一位为三位数时，此时就查询不出数据了
由于前期设计问题，在保存ip地址时，没有存为整型，而是存成了字符串形式，在查询ip的范围区间时，遇到这样的问题：
select ip from t_ip where ip between '192.168.11.1' and '192.168.11.150' ，当末尾ip地址最后一位为三位数时，此时就查询不出数据了。
查了一下mysql自带有一个对ip地址做处理的函数inet_aton，作用主要是给出一个作为字符串的网络地址的"点地址"(如127.0.0.1)表示，返回一个代表该地址数值的整数，它产生的数字是按照网略字节顺序。
以上语句改为:select ip from t_ip where inet_aton(ip) between inet_aton('192.168.11.1') and inet_aton('192.168.11.150')这样就能有效比较查出数据了
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