What is the purpose of normalization?

How are relationships between entities represented in the relational data model?

What are the differences between Relational and Non-Relational Databases?

Find a systems analyst or database administrator within your company or any other company that uses a database management system to organize the companys corporate data, and ask this person to describe what additional information should be collected during requirements analysis that is needed for file and database design but that is not very useful for earlier phases of systems development. Provide practical real-world examples.