Your help will greatly be appreciated for these questions. Thanks :) Let R(ABCD)

Question

Your help will greatly be appreciated for these questions. Thanks :)

Let R(ABCD) be a relation with functional dependencies A B, C D,A D C, BC A Which of the following is a lossless-join decomposition of R into Boyce-Codd Normal Form (BCNF)? {AB,AC,AD,CD} {AB,AD,CD} {AB,AD,BC,CD} {AB,BC,ACD} Relation R(A,B,C) currently has only the tuple (0,0,0), and it must always satisfy the functional dependencies A B and B C. What condition(s) must be obeyed by any tuple that may be inserted without violating cither of these FD's? Identify from the list below the tuple that may be inserted into R legally. (0,2,0) (1,0,1) (0,12) (1,2,3) Which of the following relations is in Boyce-Codd Normal Form (BCNF)? R(ABCD) FD's: C B;D A;C D;A C R(ABCD) FD's: A D;C A;D B;AC B R(ABCD)FD's:C B; BC A;A C;BD A R(ABCD) FD's: ABC D ; BCD A ; D C ; ACD B

Explanation / Answer

1.C

2.B

3.A

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.