Webshop是一个B-C模式的电子商城，该电子商务系统能实现前台用户购物和后台管理两大功能-Webshop is a BC model of e-mall, the e-commerce system enables users to shop front and back office management of the two functions

SQL 多表联合查询，实现动态语言查询，可加注到储存过程实现每天自动更新数据数(BC组)。-SQL multi-table queries, dynamic language queries, stored procedures can be raised to automatically update the data count (BC group) every day.