ACCT 484 Lecture Notes - Lecture 8: Cardinality, Second Normal Form, Third Normal Form

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What is a database: a collection of related records organized so multiple users and multiple computer applications can use the data. What is the difference between logical and physical view of the data: logical: what data we want to store in the database, physical: actual files how we store the information and where we store those files. Why are databases important to businesses: most critical information in a business is stored in a database. What is the purpose of a data dictionary: tells us what data is in the database. What is data independence: the data is independent from the computer applications. Why is it important when discussing databases: it can be updated and changes can be made very easily. What issues are raised for organizations by databases: critical information, volume, distribution. If it is not properly backed up, you are in trouble. Back up is important: need for accuracy.

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