Relational Model Quiz

Standard Model for Commercial DBMS Products

• Commercial Database Management Systems (DBMS) typically adhere to relational database principles, enabling structured data organization and manipulation.
• Key features include data tables, relationships, data integrity, and support for SQL (Structured Query Language) for data querying.

Creator of the Relational Model

• The relational model was created by Edgar F. Codd in the 1970s.
• Codd's work laid the foundation for modern relational databases and established the theoretical framework for storing data in tables.

Mathematics Used in the Relational Model

• The relational model employs set theory and predicate logic for data organization and querying.
• Key concepts include relations (tables), tuples (rows), and attributes (columns), which help in defining data interactions and constraints.

Key Determining Attributes in a Relation

• A key that determines other attributes in a relation is known as a functional dependency.
• This relationship indicates how one attribute's value can predict another's within a database structure.

Unique Identifiers in a Relation

• An attribute or combination of attributes that uniquely identifies each row in a relation is termed a primary key.
• The primary key ensures that no two rows in a table can have the same values in these identifying attributes, maintaining data integrity.