点菜系统数据库设计

TOC \o "1-3" \h \z 1引言 PAGEREF _Toc521466022 \h 21.1编写目的 PAGEREF _Toc521466023 \h 21.2 定义 PAGEREF

1引言 ........................................................................ 2 1.1编写目的 ................................................................ 2 1.2 定义 .................................................................... 2 1.3参考资料 ................................................................ 2 2需求分析 .................................................................... 3 2.1数据字典 .............................................................. 3 2.2数据流图 .............................................................. 3 3结构设计 .................................................................... 3 3.1概念结构设计 ............................................................ 3 3.2逻辑结构设计 ............................................................ 3 3.3物理结构设计 ............................................................ 4 4运用设计 .................................................................... 4 4.1安全保密设计 ............................................................ 4 4.2系统运行与维护 .......................................................... 3