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简要分析了连锁店MIS中采用多数据库结构的原因，介绍了实现多数据库间数据通信的主要技术问题和解决方法，并以实际项目为背景介绍了数据上传和下载的多种技术实现方法
This paper briefly analyzes the reasons for adopting multi-database structure in chain stores MIS, introduces the main technical problems and solutions to achieve data communication among multiple databases, and introduces several methods for data upload and download based on actual projects