Y A abcefg 1 10 хуz 2 11 feg 3 12 xyz 13 abcdefg q 10 Find out which of the following dependencies are valid or not. For each dependency, briefly write the reasons. 1. X -> YZ 2. X -> Z 3. XY -> A 4. A -> XYZ 5. YZ -> X 3.
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- Consider the following schedule of transactionsW1(A) W2(A) W1(A) W2(A) W1(A)Which of the following properties are true for the above schedule and justify the reason for your answer with explanation?a) Conflict Serializableb) View Serializablec) Recoverable Please answer these question in detail with full explaination. I need a proper long answer. Thanks :)List all nontrivial functional dependencies satisfied by the below A. B. Ca1. b1. c1a1. b1. c2a2. b1. c1a2. b1. c3Which of the followings can possibly be a canonical cover Fc of a set F of functional dependencies? (The actual set F or the actual relation R is not required to answer this question.) (a) {A → B,B → D,B → C}(b) {A → D,AB → C,D → B}(c) {A → B,AB → B,C → D}(d) {A → C,D → B,AB → C}(e) none of the above
- Which of the following functional dependencies are satisfied (and not satisfied) by this relation and Why? (a) A → B Why? (b) A → CD Why? (c) AB → CD Why?Which of the following functional dependencies are satisfied (and not satisfied) by this relation and Why? (g) AD → BC WHY? (h) D → B WHY? (i) D → C Why? (j) C → D Why?Assume each bank branch can issue loan independently of other branches and assumecustomers may jointly make a loan. Which of the following is correct functional dependency for the tableLoans (CustomerID, Branch, LoanNo, LoanAmount)?A) CustomerID --> LoadNo, LoanAmountB) CustomerID, Branch --> LoanNo, LoanAmountC) LoanNo, Branch --> CustomerIDD) Branch, LoanNo --> LoanAmountE) LoanNo --> LoanAmount
- Which of the following has no repeating groups but can contain partial or transitive dependencies? unnormalized data 1NF 2NF 3NF18. Which is not a desirable property of a transaction ? a. Isolation b. Atomicity c. Durability d. All are desirableIn the table Enrollments (studentID, courseNo, sectionNo, grade, status), which of the followingfunctional dependency is true?A) studentID --> gradeB) studentID, courseNo, sectionNo --> grade, statusC) studentID, courseNo --> grade, statusD) grade, status --> studentID, courseNo, sectionNo
- Database Systems Question 1. A B C D 1 20 M 101 2 21 N 102 3 22 O 103 1 21 M 104 4 22 O 105 Find out which of the following dependencies are valid or not. For each dependency, briefly write the reasons. A -> BCD AB -> C AB -> D D -> ABC BC -> ASuppose a user creates a new relation r1 with a foreign key referencing another relation r2. What authorization privilege does the user need on r2? Why should this not simply be allowed without any such authorization?Please help me with this assignment 1. Open and examine the following ERR design file people.mwb (https://acconline.austincc.edu/bbcswebdav/pid-18686108-dt-content-rid-70255490_1/xid-70255490_1) a. Each person is described by their name and email.b. Each person can be registered in multiple countries.c. Ensure it is in 3rd normal form.d. Ensure the relationships and primary and foreign keys are correct. 2. Create a database from the design. 3. Import the following data into the database people.txt (have to modify the data to match the design) people.txt Email,Full Name,Country,Date RegisteredCarley_Bahringer@destiny.com,Carley Bahringer,Brazil,1987-10-03 22:09:54Patricia_Fadel@avis.com,Patricia Fadel,Chile,2012-05-10 11:07:49Sedrick@godfrey.ca,Sedrick Kuphal,Chile,2007-11-12 00:09:53Briana_Berge@axel.ca,Briana Berge,Iceland,2006-03-26 15:32:08Lucy_Lockman@abby.org,Lucy Lockman,Iceland,2014-02-13 10:26:57Lucy_Lockman@abby.org,Lucy Lockman,France,1999-02-12…