mysql将字符转换成数字
http://blog.csdn.net/dengsilinming/article/details/8481417
http://www.cnblogs.com/zeroone/archive/2010/05/05/1727659.html
http://blog.csdn.net/dengsilinming/article/details/8481417
http://www.cnblogs.com/zeroone/archive/2010/05/05/1727659.html