Question: 2) Why do we designate one of the candidate keys of a relation to be the primary key?

2) Why do we designate one of the candidate keys of a relation to be the primary key?

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:

1) What is the difference between logical data independence and physical data independence? Which one is harder to achieve? Why? 2) Why do we designate one of the candidate keys of a relation to be...

Q:

(1) What are the differences between base relations and virtual relations? Explain with an example each. (2) How does SQL facilitate implementation of the entity integrity constraint and referential...

Q:

Consider the following relation that holds information about books in a bookstore. Books(title, isbn, author, publisherName, publisherAdd, totalCopiesOrdered, copiesInStock, publicationDate,...

Q:

Explain the difference between a key and a superkey. Why do we designate one of the candidate keys of a relation to be the primary key? Please answer both questions

Q:

Why do we designate one of the candidate keys of a relation to be the primary key?

Q:

What are the differences between base relations and virtual relations?Explain with an example each. (2) How does SQL facilitate implementation of the entity integrity constraint and referential...

Q:

b) What are the candidate keys for this relation? Identify the primary key. c) Is the relation in third normal form? If not, find a 3NF lossless join decomposition of Books that perserves...

Q:

Additional info as requested: a.using these assumptions, list all the non-trivial functional dependencies for this relation. b.what are the candidate keys for this relation? Identify the primary key...

Q:

Consider the following attributes for tables in a relational model designed to keep track of information for a moving company that moves residential customers, usually from one home or apartment to...

Q:

Consider the following attributes for tables in a ralational model designed to keep track of information for a moving company that moves residential customers, usually from one home or apartment to...

Q:

You are the media planner for an agency handling a small chain of upscale furniture outlets in a medium-sized metro market that concentrates most of its advertising in the Sunday supplement of the...

Q:

In the next period, the economy can be in either state 1 or state 2, with a probability of 50 percent. You may trade any combination, including fractions of shares, of the following three securities:...

Q:

Would the front desk person at your local gym violate HIPAA if she asked if you had received the covid vaccine?

Q:

What is the equivalent Aw of a three-year contract that pays $6,000 at the beginning of the first month and increases by $700 for each month thereafter? MARR = 3% compounded monthly The AW is closest...

Q:

Discuss how training, informal learning, and knowledge management can contribute to continuous learning and companies business strategy. page 265

Q:

Conduct a needs assessment. page 269

Q:

Explain the recruiters role in the recruitment process, the limits the recruiter faces, and the opportunities available. page 212