What is an e-r diagram- describe the symbols used in
1. What is an E-R diagram?
2. Describe the symbols used in constructing E-R diagrams.
3. What is a table of entities and activities?
4. Which entities in a narrative are included in the context diagram as internal and which are shown as external?
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1 what is an e-r diagram2 describe the symbols used in constructing e-r diagrams3 what is a table of entities and
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discussionreview the course material and other literature on the keys issues and trends in itdiscussion questions1
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1 why do we need to document an information system2 what is a physical data flow diagram dfd3 what is a logical data
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