October 4, 2023
Question 12 In SQL, relations can contain null values, and comparisons with null values are treated as unknown. Suppose all comparisons with a null value are […]
October 4, 2023
Question 15 Consider the set of relations shown below and the SQL query that follows. Students: (Roll_number, Name, Date_of_birth) Courses: (Course number, Course_name, Instructor) Grades: (Roll_number, […]
October 4, 2023
Question 17 The relation book (title, price) contains the titles and prices of different books. Assuming that no two books have the same price, what does […]
October 4, 2023
Question 18 Consider the relation account (customer, balance) where customer is a primary key and there are no null values. We would like to rank customers […]