Download Design Composite Attribute In Relational Schema Example Download Zip Pictures. The attribute address, has the attribute street name and zip code. Real world example of a sales system.
For example, average_salary in a department should not be saved directly in the database, instead it can be derived.
A relational schema outlines the database relationships and construction in a relational database in this instance, you'd have two attributes of relational schema data. § relationship relation approach • create new relation schema for s with two foreign key attributes being copies of • if multivalued attribute is composite, include its simple components. • add attribute(s) for primary key of relation. Beyond our example, composite attributes can be very useful elements in a database.