The explain database knowledge, including details of the ER diagram, triggers, relational database.

database\ER概念模型练习.ppt
........\第1章：绪论.ppt
........\第2章：关系数据库.ppt
........\第3章：关系数据库标准语言SQL.ppt
........\第4章：数据库安全性.ppt
........\第5章 数据库完整性.ppt
........\第6章：关系数据理论.ppt
........\第7章7.1 7.2 数据库的操作.ppt
........\第7章7.3 创建数据表和表的管理与操作.ppt
........\第9章第1讲 视图的使用.ppt
........\触发器.ppt
database

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