Information Technology > QUESTIONS & ANSWERS > Arizona State UniversityIFT 200Assignment2.200 (All)
Arizona State UniversityIFT 200Assignment2.200
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IFT- 200 Assignment 2 3.1. Discuss the role of a high-level data model in the database design process. 3.2. List the various cases where use of a NULL value would be appropriate. 3.3. Define t ... he following terms: Entity –. Attribute - 3.4. What is an entity type? What is an entity set? Explain the differences among an entity, an entity type, and an entity set. 3.6. What is a relationship type? Explain the differences among a relationship instance, a relationship type, and a relationship set. 3.8. Describe the two alternatives for specifying structural constraints on relationship types. What are the advantages and disadvantages of each? 3.10. When we think of relationships as attributes, what are the value sets of these attributes? What class of data models is based on this concept? 3.14. Discuss the conventions for displaying an ER schema as an ER diagram. PART 2 1. Pizza ordering system. [Show More]
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