What is a composite entity and when is it used

Assignment Help Database Management System

Reference no: EM131529031

Question: 1. What two conditions must be met before an entity can be classified as a weak entity? Give an example of a weak entity.

2. What is a strong (or identifying) relationship, and how is it depicted in a Crow's Foot ERD?

3. Given the business rule "an employee may have many degrees," discuss its effect on attributes, entities, and relationships. (Remember what a multivalued attribute is and how it might be implemented.)

4. What is a composite entity, and when is it used?

Reference no: EM131529031

Questions Cloud

Show the relationships among employee and benefit : An EMPLOYEE has only one JOB_CODE, but a JOB_CODE can be held by many EMPLOYEEs.

Discuss fraud involving concealed liabilities and expenses : Discuss fraud involving concealed liabilities and expenses, red flags associated with the fraud, and ways in which forensic accountants identify/detect them.

Create the relational diagram for this database : Use the database shown in Figure, Create the ERD for this database.

Identify the common roles in a human resource project : Identify the common roles in a human resource project. Then, analyze these roles to typical human resource functions

What is a composite entity and when is it used : What two conditions must be met before an entity can be classified as a weak entity? Give an example of a weak entity.

State the name of the law and the date the law was passed : Choose 1 U.S. environmental law. State the name of the law and the date the law was passed. Summarize the major provisions of the law that you chose.

Explanation of the concepts or theoretical applications : An explanation of the concepts or theoretical applications that pertain to this topic. A brief examination of the issue, concept, or consequences of the actions

What aspects of accomplishing tasks are made easier : What aspects are made more difficult? How can personality differences be accommodated to avoid discord and achieve the greatest impact.

Identify all of the cardinalities : Suppose you are working within the framework of the conceptual model in Figure.

User Account

All Pages