Cardinality
Cardinality means that what is the number of relationships between the two entity sets in any relationship model. There are four types of cardinality which are mentioned below.
- One-to-One
- One-to-Many
- Many-to-One
- Many-to-Many
Minimization of ER Diagrams
Pre-Requisite: ER Diagram
Entity-Relationship (ER) Diagram is a diagrammatic representation of data in databases, it shows how data is related to one another. In this article, we require previous knowledge of ER diagrams and how to draw ER diagrams.
Minimization of ER Diagram simply means reducing the quantity of the tables in the ER Diagram. When there are so many tables present in the ER DIagram, it decreases the readability and understandability of the ER Diagram, and it also becomes difficult for the admin also to understand these. Minimizing the ER Diagram helps in better understanding. We reduce tables depending on the cardinality.
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