在那时，多数大型公司就将进行数据库设计的DBA和创建逻辑设计的数据管理员分开了。
At the time, most large companies organizationally separated their DBAs who did physical database design from the data administrators who created logical design.
一个真正的关系型数据库管理系统，既在逻辑层考虑到完全规范化的数据库，又提供数据的物理存储，这些数据为了高性能而被调整。
A true relational DBMS would allow for a fully normalized database at the logical level, while providing physical storage of data that is tuned for high performance.
从餐饮连锁企业的MIS系统设计出发，对系统的逻辑结构设计、功能设计、数据库设计及系统的安全管理进行了详细的描述和深入的探讨。
Starting from MIS system design for chain eatery in this paper, the logic structure design, functional design, database design and security administration of the system is presented in detail.
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