系统主要以一电脑公司进销存管理为基本要求，主要功能包括对各个数据表的查询和维护，进货、销售、退货登记，对各个厂商进货总额、顾客购买总额、商品销售量、商品退货量、业务员业绩及薪金的排行和一些报表分析。-System is mainly a computer company, Purchase, Sales and Inventory Management for the basic requirements, the main features include data tables for each query and maintenance, purchase, sale, return the registration, the total stock of all vendors, customers to buy the total amount of sales of goods, commodities retreat volume of sales performance and salary rankings and analysis of some statements.