'Compound key' presentation slideshows

Relational Database Systems

Relational Database Systems. Higher Information Systems. The Relational Model. data is grouped into entities which are related, in order to minimise data duplication and achieve data integrity many-to-many relationships between entities are removed and replaced with one-to-many relationships.

819 views • 70 slides

May 8

May 8. More on Data Modeling. Types of Entities. Fundamental Entity regular rectangle (exist by themselves) Attributive Entity only exists because of the existence of some other entity Associative Entity result from many to many relationship. John Ahmed Mary Ngan Steve. CS211

569 views • 41 slides

Relational Data Analysis (RDA)

99 views • 9 slides