What is the importance of an e-r diagram

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1. What is the importance of an E-R diagram in facilitating event-driven systems and the integration of data between business processes?

2. Appendix B) How is a composite key implemented in a relational database model?

3. (Appendix B) What is the difference in implementation of a one-to-many and a one-to-one relationship in a relational database model?

Reference no: EM131357252

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