Overview
The Entity-Relationship Model (ERM) is a foundational concept in database design that helps visualize and structure data. It consists of entities, attributes, and relationships, which together define how data is organized and how different data points interact with each other. Understanding these co...
Key Terms
Example: A 'Student' or 'Course' in a university database.
Example: A 'Student' entity may have attributes like 'Name' and 'Age'.
Example: A 'Student' enrolls in a 'Course'.
Example: One student can enroll in multiple courses (1:N).
Example: Every student must enroll in at least one course (total participation).
Example: A diagram showing students, courses, and their relationships.
Related Topics
Normalization
Normalization is the process of organizing data to reduce redundancy and improve data integrity.
intermediateRelational Database Management Systems
RDBMS are systems that manage data structured in a relational format, using tables.
intermediateSQL Basics
SQL (Structured Query Language) is used to communicate with databases and perform operations on data.
beginnerKey Concepts
EntitiesAttributesRelationshipsCardinality