3NF

There are 3NF ( third Normal Form ) scheme and star scheme for data warehouse dimensional modeling .

数据仓库维度建模有第三范式（3NF）和星型2种模式，3NF模型适用于地调数据仓库中心建模；

The database strictly accord with the third normal form ( 3NF ), to ensure the database structure reasonable .

该数据库严格遵守第三范式（3NF），保证数据库结构合理。

On the aspect of Searching Mechanism , the system optimizes searching from database structures as well as searching algorithm : The design of database structures standardizes to 3NF ;

在查询方面，系统从数据库结构和查询算法两个方面做了相应的优化：系统的数据库设计按第3范式规范化。

Regardless of schema ( 3NF or Star ), the Teradata query optimizer relies on statistics to help it determine the best way to access data .

不管哪种模式（3NF或Star），Teradata查询优化器依赖于统计信息帮助确定最佳数据访问路径。

All the tables in the database are normalized to a3rd Normal Form ( 3NF ), so we can start creating our database structure based on the above ERD .

数据库中的所有表都按第三范式（3rdNormalForm，3NF）进行了标准化，所以我们可以开始创建基于前面的ERD的数据库结构。

This paper introduces the theory of Normal Form in Database designing of Relation Mode , and proposes that resorting to BCNF & 3NF to design the structure of Table in Library Network Database having the optimized performance , which can process huge data with high speed .

本文介绍了关系模型数据库设计的范式理论，并结合高校图书馆网络数据库的性能优化问题，提出利用BCNF和第三范式设计表结构，使得该数据库能高速处理大容量的数据。