Identify the primary and foreign keys in your 3nf relations.
确定你的3nf关系的主键和外部键。
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。
Method According to practice, method of non-3NF, method library, independence of data, optimization of programming were induced and presented.
方法依据实践归纳并提出非3nf、方法库、数据独立性以及程序优化等方法。
All the tables in the database are normalized to a 3rd 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。
Remember, these normalization guidelines are cumulative. For a database to be in 3NF, it must first fulfill all the criteria of a 2NF and 1NF database.
记住,这些规范化准则是渐增的。如果一个数据库满足第三范式,那么它必须先满足了第二范式和第一范式的条件。
A new normal form for relational schemes called 3.5 normal form is defined in this paper. It is strictly stronger than simple normal form which is stronger than 3nf.
本文对包含多值相关性的关系框架定义了一种新的范式—3.5范式,它是严格强于简单范式,而简单范式又是强于第3范式。
In order to meet the opening request of the data warehouse and guarantee that DQAS can run at a high speed, data warehouse adopts a structure that combines 3nf with star mode.
为了满足数据仓库的开放性要求并确保DQAS高速运行,数据仓库采用了第三范式与星型结构相结合的形式。
In order to meet the opening request of the data warehouse and guarantee that DQAS can run at a high speed, data warehouse adopts a structure that combines 3nf with star mode.
为了满足数据仓库的开放性要求并确保DQAS高速运行,数据仓库采用了第三范式与星型结构相结合的形式。
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