schema

schema

Define the following terms: relation schema, relational database schema, domain, relation instance, relation cardinality, and relation degree.
How many distinct tuples are in a relation instance with cardinality 22?
Does the relational model, as seen by an SQL query writer, provide physical and logical data independence? Explain.
What is the difference between a candidate key and the primary key for a given relation? What is a superkey?
schema