Which of the following statements best describes a partial dependency? O a. A partial dependency exists when there is a functional dependence in which the determinant is only part of the primary key. O b. A partial dependency exists when there is no functional dependence in which the determinant is only part of the primary key. O C. A partial dependency exists when there is a functional dependence in which the determinant is the primary key. O d. A partial dependency exists when there is no functional dependence in which the determinant is the primary key.

Which of the following statements best describes a partial dependency? O a. A partial dependency exists when there is a functional dependence in which the determinant is only part of the primary key. O b. A partial dependency exists when there is no functional dependence in which the determinant is only part of the primary key. O C. A partial dependency exists when there is a functional dependence in which the determinant is the primary key. O d. A partial dependency exists when there is no functional dependence in which the determinant is the primary key.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

Which type of functional dependency must be eliminated in the second normal form? A.Partial functional dependency B.Transitive functional dependency C.All the above D. Primary key to foreign key functional dependency
Which of the followings describe the relationship between “super key” and “candidate key”?(a) A super key is also a candidate key.(b) A Super key K is a candidate key, if K is minimal(c) A candidate key K is a super key, if K is minimal(d) A candidate key is also a super key
In what situations would a "transitive dependency" become a direct dependency?
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?
What exactly do you mean by "transitive dependency"?
What do you mean by "transitive dependency" in your definition?
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?
What is partial dependency? With what normal form it is associated?
SpecificationFunctional DependencyConsider the relational schemas given below and the respective sets of functional dependencies valid in the schemas. For each one of the relational schemas identify its highest normal form. Remember that the identification of a normal form requires analysis of the valid functional dependencies and the minimal keys. FLIGHT(passenger, phone#, flight#, seat#, departure-place,departure-time)The values of attributes of a relational table FLIGHT satisfy the following properties:- a passenger has one phone number,- a passenger books seats on many different flights,- the attributes flight#, seat#, and departure place uniquely identify each passenger,- only one flight takes of from a given departure place at a given departure time.
113. The template conclusion is a set of tuples that must be included in the relations in the template dependency called a. constraint generating templates b. tuple generating templates c. schema generating templates d. relation filtering template
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
Suppose that you are given a relation R = (A,B,C,D,E) with the following functional dependencies: {BC → ADE, D → B}. Find all candidate keys. thank you in advance