OA系统的需求设计文档，数据模型和N层程序架构示范程序(c#)-repuirement document of OA system,includes data model and example application of N layers using C#

获取供应商的银行基本信息，各种从地点层。地质层各个角度获取的sql语句- Supplier s bank to get basic information from a variety of locations layers. Sql statement to obtain geological layers from different angles