Question 19 Consider the relation “enrolled(student, course)” in which (student, course) is the primary key, and the relation “paid(student, amount)” where student is the primary key. […]

Question 20 Consider the relation enrolled(student, course) in which (student, course) is the primary key, and the relation paid(student, amount), where student is the primary key. […]

Question 25 A company maintains records of sales made by its salespersons and pays them commission based on each individual’s total sales made in a year. […]

Question 26 A table ‘student’ with schema (roll, name, hostel, marks), and another table ‘hobby’ with schema (roll, hobbyname) contains records as shown below: Table: Student […]