Database Fundamentals
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Questions and Answers

What is a primary key in a database record?

  • A field used to identify a record in another table
  • A field that contains data and has a data type and a picture
  • A collection of records that contain the same fields
  • A field or combination of fields that uniquely identifies a record (correct)

    • What is a foreign key in a database record?

  • A field that uniquely identifies a record in a table
  • A field that is used to relate to a primary key in another table (correct)
  • A collection of records that contain the same fields
  • A field that contains data and has a data type and a picture

    • What is a database?

  • A collection of related files or information about a subject (correct)
  • A table that contains related records
  • A record that contains related fields
  • A field that contains data and has a data type and a picture

    • What is a table in a database?

    <p>A collection of records that contain the same fields</p> Signup and view all the answers

    What is the problem with a flat database in the scenario described?

    <p>Customer details are duplicated unnecessarily many times</p> Signup and view all the answers

    What is the advantage of relating tables in a database?

    <p>It prevents data duplication</p> Signup and view all the answers

    What is a record in a database?

    <p>A collection of fields that contain data</p> Signup and view all the answers

    What is a field in a database?

    <p>A unit of data that has a data type and a picture</p> Signup and view all the answers

    What is a major advantage of relating tables in a database?

    <p>It minimizes the size of the database</p> Signup and view all the answers

    What happens when we update the address and phone number of a customer in a relational database?

    <p>We only need to update the customer's information in one place</p> Signup and view all the answers

    What is the purpose of the 'Cust ID' column in the Customers table?

    <p>To link the customer to their orders</p> Signup and view all the answers

    What is an advantage of minimizing data redundancy in a database?

    <p>It minimizes the work involved in entering new records</p> Signup and view all the answers

    What is the purpose of the Orders table?

    <p>To store order details</p> Signup and view all the answers

    What is a benefit of using a relational database?

    <p>It enhances the response time of the database application</p> Signup and view all the answers

    What is the result of relating tables in a database?

    <p>Data redundancy is minimized</p> Signup and view all the answers

    What information do we enter when creating a new order in the Orders table?

    <p>The customer's ID and order details</p> Signup and view all the answers

    What is the primary function of a database management system (DBMS)?

    <p>To create, store, organize, and access data from a database</p> Signup and view all the answers

    What is the primary purpose of a database management system?

    <p>To manage and use data from a database</p> Signup and view all the answers

    Which of the following is an example of a DBMS for desktop systems?

    <p>Microsoft Access</p> Signup and view all the answers

    What is the primary difference between Oracle Database and Oracle Database Lite?

    <p>Oracle Database is for desktop systems, while Oracle Database Lite is for small handheld computing devices</p> Signup and view all the answers

    What is the primary purpose of identifying the data required by a business?

    <p>To create files for business data</p> Signup and view all the answers

    Which of the following is an example of a DBMS for large mainframes and midrange computers?

    <p>DB2</p> Signup and view all the answers

    What is the primary reason for using a database management system?

    <p>To manage and use data from a database</p> Signup and view all the answers

    Which of the following is an example of a popular DBMS?

    <p>MYSQL</p> Signup and view all the answers

    Study Notes

    Database Concepts

    • A primary key is a field (or combination of fields) in a database record that uniquely identifies the record.
    • A foreign key is a field (or combination of fields) in a database record that is used as a primary key in another table.

    Database Structure

    • A database is an organized collection of related files or information about a particular subject.
    • A table is a collection of records that contain the same fields.
    • A database contains one or more tables.
    • Each record in a table has a number of fields, and each field contains data and has a data type and a picture.

    Relational Databases

    • A relational database is a database made up of related tables.
    • Relating tables in a database eliminates unnecessary duplication of data and reduces data update tasks.

    Advantages of Relating Tables

    • Relating tables minimizes the size of the database.
    • Relating tables enhances the response time of the database application.
    • Relating tables minimizes the work involved in entering new records.
    • Relating tables minimizes the work involved in editing existing records.

    Database Management System (DBMS)

    • A DBMS is a specific type of software for creating, storing, organizing, and accessing data from a database.
    • Examples of DBMS include ORACLE, MS SQL Server, MS Access, DB2, and MYSQL.
    • Each DBMS is suitable for specific types of systems, such as desktop systems, mainframes, midrange computers, and handheld devices.

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    Understand the basics of database systems, including primary keys, foreign keys, and tables. Learn how to identify and define records with unique identifiers.

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