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Which relational algebra operators can be applied to a pair

Database Questions

At least one paragraph (100 words or more) per question.

1. Which relational algebra operators can be applied to a pair of tables that are not union-compatible?
2. Discuss Unified Modeling Language (UML) class diagrams.
3. What is the minimal data rule in conceptual design? Why is it important?

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Database Management System: Which relational algebra operators can be applied to a pair

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