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midterm review_1

midterm review_1 - Midterm Review 1 In the beginning We...

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Midterm Review!!!!!! 1. In the beginning… We started off with a discussion of the evolution of databases. You should be familiar with this discussion - most specifically: a. what are the different types of databases? i. Hierarchical ii. Network iii. Relational iv. Object-oriented v. Object-relational vi. b. what are the advantages and disadvantages of each one? (i.e., dependencies) c. what key factors each one from the other? d. why do we focus on relational databases in this course? e. why do you have to take this course (besides the fact that it's required)? 2. Database Development – you should know: a. ISA: (information systems architecture) or blue print, for information systems in an org. you develop an enterprise data model as part of a total information systems architecture or an organizational plan for data resources. Consists of 6 key components: - Data: (can be represented at a general level but there are other representations) - Processes: that manipulate data (these can be represented by data flow diagrams, object- models with, or other notations) - Networks: that transport data around the organization and between the organization and its key business partners (which can be shown by a schematic of the network links and topology)
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