For sa & d projects , all foreign keys are identified and marked in the entity description part iii ( entity key description ) . for sa & d projects , all entities are in third normal form ( 3nf ) 对于系统分析及设计的计划,所有外键码须经认定,并且在数据实体描述的第iii部分(数据实体关键码描述)界定。
third normal form meaning:[Computer] < database > A series of steps followed to obtain a database design that allows for efficient access and storage of data in a relational database . These steps reduce data red...third normal form 뜻:제3정규형third normal form перевод:Третья нормальная форма