IP_Liulang表的数据如：
id ip IP_datetime IP_url
749 127.0.0.1 2009-11-17 11:48:01.967 Index.aspx
750 127.0.0.1 2009-11-17 11:48:03.403 ChatRoom
751 127.0.0.1 2009-11-17 11:48:04.543 Task
752 127.0.0.1 2009-11-17 11:48:11.780 VFClassroom
753 127.0.0.1 2009-11-17 11:48:12.717 Game
754 127.0.0.1 2009-11-17 11:48:13.717 Zsy
755 127.0.0.1 2009-11-17 11:48:14.733 CoursewareManagement
756 127.0.0.1 2009-11-17 11:48:16.000 friend
757 127.0.0.1 2009-11-17 11:48:18.687 http://localhost:1147/ttxs/user/RefLog.aspx
758 127.0.0.1 2009-11-17 11:48:19.047 http://localhost:1147/ttxs/user/ValidateCode.aspx
759 127.0.0.1 2009-11-17 11:48:20.750 http://localhost:1147/ttxs/index.aspx
760 127.0.0.1 2009-11-17 11:48:22.530 friend
761 127.0.0.1 2009-11-17 11:48:23.937 VFClassroom
762 127.0.0.1 2009-11-17 11:48:25.043 Task
763 127.0.0.1 2009-11-17 11:48:27.750 ChatRoom
764 127.0.0.1 2009-11-17 11:48:29.357 http://localhost:1147/ttxs/about/help.aspx
765 127.0.0.1 2009-11-17 11:48:33.187 CoursewareManagement
766 127.0.0.1 2009-11-17 11:48:34.403 http://localhost:1147/ttxs/index.aspx
我要实现的是，同一天内有多少个不同的ip访问过 一下指定的页面。（是不同IP在同一天的总数）
插入到如下表：
IP_page表结构如下：
