-- Verify that data has been inserted correctly 
   (list contents of each table)


-- Find first names and last names of all students


-- Find all students whose first name is John 
   (list all their attributes)


-- Find the pid, name and MAS201 credits of students registered for MAS201


-- Find the other classes taken by MAS201 students 
   (list student name and class name)


-- Find the other classes taken by students who take MAS201 
   (list just the class names, uniquely)


-- Find the MAS201 students who take a Friday 11:00am class


-- Find the enrolled students and total credits for which they have registered 
   (output student id, first and last name, and total credits)


-- Find all students and total credits for which they have registered
   (list same info as for enrolled students)

-- Find students who take every class that John Smith takes
   (list id, first and last name)