Relational Database Fundamentals Quiz
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Questions and Answers

What is a primary key in a relational database?

  • A field that is not necessary for database operations
  • A field that stores non-unique data
  • A field that is duplicated in multiple tables
  • A field that is unique for each entity (correct)

    • What is the purpose of a foreign key in a relational database?

  • To uniquely identify each record in a table
  • To duplicate data in different tables
  • To create a relationship between two tables (correct)
  • To store non-unique data

    • What is the advantage of using primary keys in a relational database?

  • Make data retrieval slower
  • Not necessary for database operations
  • Used to join tables and ensure data integrity (correct)
  • Increase redundancy in the database

    • What is the purpose of an entity in a relational database?

    <p>It stores the data about someone or something of interest</p> Signup and view all the answers

    What is the purpose of a database schema?

    <p>It lists all the tables, fields, primary and foreign keys in the database</p> Signup and view all the answers

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