Learning Apache Cassandra - Second Edition

Conceptual data model (entity relationship model)

For those with a background in relational systems, the ER model should be quite familiar. An entity-relationship model is used to describe relationships between inter-related entities. There are two major components of the entity relationship model:

• Entity: An entity is a thing or object involved in an information system
• Attribute: Entities are represented by properties known as attributes
• Relationship: A relationship is an association or interaction between entities

ER models/diagrams can be quite useful in designing tables for Cassandra. They are useful in Cassandra data modeling in most cases except for a few special scenarios. So, we will be taking a look at some of the concepts of the ...