Database Design - Cardinality I am currently studying for my MTA Database Fundamentals cert, and I came across this question during my studies.  However, the answer doesn't make any sense to me.  Here is the question/answer:


It is my understanding that 'cardinality' defines the relationship of the database entities, such as if the relationship is 1:1, 1:many, or many:many.  How does removing a row affect the cardinality of this database entity at all?

Question/Answer source is from EnsurePass.
The answer may be referring to cardinality as in the number of rows within the table.  This link has an explanation of each definition of cardinality in a database:

http://www.programmerinterview.com/index.php/database-sql/cardinality-in-sql/