Database Concepts Chapter 9 Review

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Questions and Answers

What is a database?

  • A collection of related data (correct)
  • A collection of random data
  • A type of software
  • A collection of unrelated data

What does dividing data into tables eliminate?

Data duplication or data redundancy

What is a database schema?

  • A type of database software
  • A description of the data organization (correct)
  • The physical storage of data
  • An application for data processing

A table with no relationship to any other table belongs in the database.

<p>False (B)</p> Signup and view all the answers

What limits the sorting and searching capabilities of a database?

<p>A field that stores more than one piece of data</p> Signup and view all the answers

Make field names __________.

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

Which types of data are supported in a database?

<p>All of the above (D)</p> Signup and view all the answers

What does the size of a field indicate?

<p>The number of characters or the type of number it can store</p> Signup and view all the answers

Choose the correct formats for displaying data in fields:

<p>Fixed (A), Long (C), Percent (D)</p> Signup and view all the answers

Match the data types with their examples:

<p>Retail Price = Currency Order Date = Date/Time First Name = Text Product Description = Memo E-Mail Address = Hyperlink Record ID = AutoNumber Delivery Time = Date/Time Peanut Allergy = Yes/No Quantity = Number</p> Signup and view all the answers

What is the purpose of a primary key?

<p>To ensure each record has a unique identifier (C)</p> Signup and view all the answers

What is a form in the context of databases?

<p>A database object used for entering and viewing records</p> Signup and view all the answers

Only one record can be displayed at a time in a form.

<p>True (A)</p> Signup and view all the answers

Adding a logo to a form does not enhance its presentation.

<p>False (B)</p> Signup and view all the answers

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Study Notes

Database Basics

  • A database is a collection of related data.
  • RDBMS (Relational Database Management System) organizes data into tables, ensuring structured data storage.

Data Organization

  • Dividing data into tables minimizes unnecessary data duplication, also known as data redundancy.
  • A database schema describes the organization's data structure and aims to group information efficiently with minimal redundancy.
  • Each table should have relationships with at least one other table; isolated tables do not belong in a well-structured database.

Table Structure

  • A column in a table, also called a field, is used to store specific types of data.
  • Combining multiple pieces of data in a single field can hinder sorting and searching capabilities.

Naming Conventions

  • Field names should be unique, concise, descriptive, and avoid special characters.

Data Types

  • Common data types include:
    • AutoNumber
    • Text
    • Number
    • Date/Time
    • Currency
    • Memo
    • Yes/No
    • Hyperlink
    • Attachment
    • Lookup

Field Properties

  • The size of a field defines the character count or type of number it can store:
    • "Single" is for decimal numbers.
    • "Long Integer" is for whole numbers.

Field Formatting

  • Field formatting determines how data is displayed:
    • Options include Fixed, Percent, Standard, Long, Medium, Short.
  • Text fields typically do not have a specific format.

Example Field Types

  • Retail Price: Currency
  • Order Date: Date/Time
  • First Name: Text
  • Product Description: Memo
  • E-Mail Address: Hyperlink
  • Record ID: AutoNumber
  • Delivery Time: Date/Time
  • Peanut Allergy: Yes/No
  • Quantity: Number

Primary Key Setup

  • To set a primary key:
    • Click in the primary key field, then navigate to Design > Primary Key.
    • The Required option ensures each record has a primary key entry.
    • Multiple keys can be established by selecting gray boxes next to fields.

Forms

  • A form is essential for data entry and retrieving records from a table.
  • Different types of forms include simple, split, and multiple items forms.

Form Formatting

  • Logos can enhance form professionalism.
  • Formatting options for forms are bold, font size adjustments, and predefined formats.

Data Entry Efficiency

  • Forms must be in Form view to add new records and display existing ones effectively.
  • Record controls at the bottom help navigate through specific records or create new entries.
  • Forms streamline data entry by displaying one record at a time, reducing errors.

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