August 2009
Intermediate to advanced
893 pages
26h 48m
English
Content preview from Database Systems: Concepts, Design and Applications
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Review Questions
| 1. | What is E-R modelling? How is it different than SQL? |
| 2. | Discuss the basic concepts of E-R model. |
| 3. | What are the semantic concepts of E-R model? |
| 4. | What do you understand by an entity? What is an entity set? What are the different types of entity type? Explain the concept using semantic net. |
| 5. | When is the concept of weak entity used in the data modelling? |
| 6. | What do you understand by a relationship? What is the difference between relationship and relationship occurrence? |
| 7. | What is a relationship type? Explain the differences between a relationship type, a relationship instance and a relationship set. |
| 8. | Explain with diagrammatical illustrations about the different types of relationships. |
| 9. | What do you understand by degree of relationship? ... |