Cardinality
Everything on SkillVeris tagged Cardinality — collected across the glossary, study notes, blog, and cheat sheets.
2 resources across 1 library
Interview Questions(2)
What Are Index Selectivity and Cardinality?
Cardinality is the number of distinct values in a column, and selectivity is the ratio of distinct values to total rows — a high-selectivity column (close to 1…
What Are the Basics of Entity-Relationship (ER) Modeling?
Entity-relationship modeling represents a database's structure using entities (things like Customer or Order), attributes (properties of those entities), and r…