Computers and Technology, 18.08.2021 21:00 mlopezmanny5722

1. Discuss attribute semantics as an informal measure of goodness for a relation schema. 
2. Discuss insertion, deletion, and modification anomalies. Why are they considered bad? Illustrate with examples.
3. Define fourth normal form. When is it violated? When is it typically applicable?
4. Define join dependency and fifth normal form.
5. Why is 5NF also called project-join normal form (PJNF)?
6. Why do practical database designs typically aim for BCNF and not aim for higher normal forms?

Answers: 2

Show answers

Other questions on the subject: Computers and Technology

Computers and Technology, 21.06.2019 17:10, isophk

Can be categorized as popularity, relevancy, and user satisfaction. select one: a. mobile search seo b. ranking factors c. serp d. web analytics

Answers: 1

continue

Computers and Technology, 22.06.2019 22:10, Metlife

Asequential circuit contains a register of four flip-flops. initially a binary number n (0000 ≤ n ≤ 1100) is stored in the flip-flops. after a single clock pulse is applied to the circuit, the register should contain n + 0011. in other words, the function of the sequential circuit is to add 3 to the contents of a 4-bit register. design and implement this circuit using j-k flip-flops.

Answers: 1

continue

Computers and Technology, 23.06.2019 08:00, hernandez09297

What is a scenario where records stored in a computer frequently need to be checked

Answers: 2

continue

Computers and Technology, 23.06.2019 10:00, uwunuzzles

How do i delete my account on this because i didn't read this agreements and also i put age at xd

Answers: 1

continue

You know the right answer?

1. Discuss attribute semantics as an informal measure of goodness for a relation schema. 
...