Question

Fill in the first blank for each question. 1.  (________) Descriptive data stored with input sources. 2.  (________)...

Fill in the first blank for each question.

1.  (________) Descriptive data stored with input sources.

2.  (________) a rule that must be followed by data in a database.

3.  (________) a relationship between three entities in which each occurrence of each entity

4.  (________) A person, place, event, item, or other transaction for which you want to store and process data

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Homework Answers

Answer #1

1.Transactional Databases

2.Codd's 12 Rules must be followed by data in database

Information Rule

Guaranteed Access Rule

Systematic Treatment of NULL Values

Active Online Catalog

Comprehensive Data Sub-Language Rule

View Updating Rule

High-Level Insert, Update, and Delete Rule

Physical Data Independence

Logical Data Independence

Integrity Independence

Distribution Independence

Non-Subversion Rule

3.Ternary Relationships

ternary relationship among three entities only when the concept cannot be represented by several relationship

4. An entity is a person, place, object, event, or idea for which you want to store and process data

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