Question: A weak entity is one that _ _ _ _ _ . a . has a foreign key attribute that can be null b .

A weak entity is one that _____.
a. has a foreign key attribute that can be null
b. can exist without the entity with which it has a relationship
c. has a primary key that is not derived from the parent entity in a relationship
d. inherits a part of its primary key from its counterpart in a relationship

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Q:

Multiple choices: 8. A car's color is an example of a ________. a. multivalued attribute b. derived attribute c. single-valued attribute d. simple attribute 15. In the Chen notation, ________. a....

Q:

(4) Retrival each project code and its total amount according to contact relation. (5) Retrival sample name, tensilevalue and corresponding contact name which belongs to the contact with code...

Q:

Which of the following describes referential integrity? A primary key of a relational table must not contain a null value The value for a foreign key attribute must either be null or match one of the...

Q:

Which of the following describes referential integrity? A primary key of a relational table must not contain a null value The value for a foreign key attribute must either be null or match one of the...

Q:

A. Lab # : BSBA BIS245A-2 B. Lab 2 of 7 : Skills Development in Visio; Creation of MS Access Database C. Lab Overview Scenario / Summary COs: 1. Given a business situation in which managers require...

Q:

I want to turn it in on msword Assignment # 3 Assignment Objective: The goal of this assignment is to develop database model and database design that will assist in understanding the relational...

Q:

Question 21 6 points Which of the following about integrity constraints in relational database systems is/are correct? Select all that apply The entity Integrity rule states that no primary key...

Q:

please solve quickly i'm on limited time 4. (30 points)Now scientific interest class management database system will be developed in a Middle school according to the situation in real mini-world as...

Q:

I Form is the relation? Please give the reason for the conclusion (4 points) quides and devords 4. (34 points)Now a sport activity manamgement database system will be developed in a university...

Q:

please, answer the question 4. (30 points)Now scientific interest class management database system will be developed in a Middle school according to the situation in real mini-world as follows: Every...

Q:

What is the future value of $1,101 invested for 9 years at 7 percent compounded annually? 2. What is the present value of $18,664 to be received 7 years from today if the discount rate is 7 percent?...

Q:

In a supersonic nozzle flow, the exit-to-throat area ratio is 10, p 0 = 10 atm. and the backpressure P B = 0.04 atm. Calculate the angle 8 through which the low is deflected immediately after leaving...

Q:

* You don't have to answer PART b . * Periodic System Computing Cost of Sales and Gross Profit under FIFO and LIFO inventory taken on March 3 1 showed 6 0 units available in inventory. Valley uses...

Q:

Consider the following grammar: stmt rightarrow if-stmt \ass-stmt epeat-stmt repeat-stmt rightarrow repeat stmt until (exp) ass-stmt rightarrow var:= exp exp rightarrow exp + term \term term...