Given a relation R(A, B, C, D) with the functional dependencies {A → B, B → C, A → D}, what is the closure of {A}?

Given a functional dependency AB→C in a relation, which of the following statements is incorrect regarding splitting?

Given the following relations:    Booking(agent: String, traveler ssn: integer, trip id: integer) GoesOn(ssn: integer, id: integer) Leg(Trip id: integer, startLocation: String, endLocation: String, startDate: Date, endDate: Date) Owns(ssn: integer, passport number: integer, country: String) Passport(passport number: integer, country: String, expirationDate: Date, holderName: String) TravelAgent(name: String, years experience: integer, phone: String) Traveler(name: String, ssn: integer, dob: Date) Trip(id: integer, start location: String, end location: String, start date:Date, end date: Date)   Show the SQL queries for the following questions (2 points each): 1) List the names of travelers who have not booked any trips. 2) List trip details booked by agents with at least 10 years of experience. 3) Retrieve the names of travelers who have traveled to at least two different destinations. 4) List the names of travelers who do not have a passport.

Consider the following SQL query:   SELECT DISTINCT agent, traveler_ssn FROM Booking;   Which of the following best describes the result of this query?

Given the two relations R and S as bags with the following records      Perform a Natural Outer Join between R and S. You must show the final resulting relation here on canvas. Intermediary steps will not be graded.

Given the functional dependencies A→B and B→C, which of the following statements is true?

In a relational database, if we say that “A → B” is a functional dependency, what does it imply?

Consider the following SQL statement:   UPDATE Employees SET salary = salary * 1.10 WHERE department = ‘HR’;   What will this command do?

When using UNION between two SELECT statements, what will the resulting output include?

Which tube gives you plasma instead of serum?