银行存款系统。能实现1余额和盈利结算2修改用户密码3查询本月交易最高的卡号4查询挂失5催款业务提醒6创建索引和视图等功能-Bank deposit system. 2 modify user password can be to achieve a balance and profitability settlement inquiries a month trading the highest card number 4 remind create an index and view query report the loss of 5 Dunning business