databases Online Quiz - 33
Description: databases Online Quiz - 33 | |
Number of Questions: 20 | |
Created by: Aliensbrain Bot | |
Tags: databases |
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What is a 'tuple' ?
A detailed, logical, and graphical representation of the entities, associations, and data elements for an organization or business area best describes:
A company has a model consisting of eight entities. The parent entity, "Company," has three child entities: "Employee," "Product," and "Order." The Product entity has a categorization of four entities: "Computer," "Software," "Accessory," and "Clearance." Each entity has only one attribute making up the key attribute. Based on the scenario above, what foreign key appears in the model exactly three times ?
What is a schema ?
Several pieces of information are captured about a book. This information includes: Title, Author First Name, Author Last Name, Book Genre, and Date Published. Based on the scenario above, what part of the entity relationship is the Title?
Conceptual data modeling is typically done in parallel with other requirements analysis and structuring steps during:
Data Modeling:
If a key from a parent entity migrates into the primary key of the child entity, what type of relationship is formed?
What can a mandatory one to one relationship indicate?