Organizations have a vital need for quality information. Discuss how the following database roles relate to each other.
Database Design
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Exercise 1
Organizations have a vital need for quality information. Discuss how the following database roles relate to each other.
· Data Administrator
· Database Administrator
· Database Designer
· Application Developer
· End-Users
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Exercise 2
A database approach uses different data models. Common database models include the relational model, the network model and the hierarchical model. Which data model should be chosen under which circumstances and why.
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Exercise 3 Describe the features of a distributed database management system (DDBMS).
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Exercise 4 Discuss each of the following concepts in the context of the relational data model:
· relation
· attribute
· domain
· tuple
· intension and extension
· degree and cardinality.
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