What Does Cardinality Mean?
The term “cardinality” in database design has to do with counting tables and values. With that said, cardinality has three main definitions. It can relate to counting the number of elements in a set, identifying the relationships between tables, or describing how database tables contain a number of values, and what those tables look like in general.
Techopedia Explains Cardinality
We’ll start with the easiest definition of cardinality – cardinality in mathematics. In mathematical terms, cardinality means simply counting the elements in the set.
