Questions

  1. An entity relationship schema shows how _____are related to each other in a database.
  2. A primary key ____-ly identifies an observation in a ____.
  3. A primary key in one table can be a foreign key in another table. Can the foreign key alone uniquely describe a row of data in a table?
  4. What’s the purpose of primary keys and foreign keys?
  5. Can primary keys have repeat values in a table?
  6. Can foreign keys have repeat values in a table?
  7. Are primary and foreign keys related only through one-to-one relationships?