What is an entity cluster

Assignment Help Database Management System

Reference no: EM131529062

Question: 1. What is an entity cluster, and what advantages are derived from its use?

2. What primary key characteristics are considered desirable? Explain why each characteristic is considered desirable.

3. Under what circumstances are composite primary keys appropriate?

4. What is a surrogate primary key, and when would you use one?

Reference no: EM131529062

Questions Cloud

Show the dependency diagram for each table : The dependency diagram in Figure indicates that a patient can receive many prescriptions for one or more medicines over time. Based on the dependency diagram.

Explain the advantages of understanding accounting : Explain advantages of understanding accounting as it relates to your current or future position. Consider careers in management, sales and business operations.

The developments leading to the nazi genocide of jews : Explain first the role that such factors played in the developments leading to the Nazi genocide of Jews,then draw on relevant example from the cases of Namiba.

What is normalization : When is a table in 1NF?

What is an entity cluster : What primary key characteristics are considered desirable? Explain why each characteristic is considered desirable.

Provide a brief overview explanation of the us : Provide a brief overview explanation of the U.S. as a police power in the world. End your introduction with your thesis statement.

What is time-variant data : When implementing a 1:1 relationship, where should you place the foreign key if one side is mandatory and one side is optional?

What concepts did you find to be the most-least enjoyable : What concept(s) did you find to be the most/least enjoyable? Why? Which concept(s) do you think will be most applicable in your chosen career? Explain.

What is a partial dependency : What three data anomalies are likely to be the result of data redundancy? How can such anomalies be eliminated?

User Account

All Pages