databases ms. scales. what is a database? database a collection of data organized for fast search...
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Databases
Ms. Scales
What is a Database?Database
A collection of data organized for fast search and retrieval
Examples:Telephone DirectoriesHospital RecordsCatalog Mailing ListsOnline EncyclopediasGoogle
Who Uses Computer Databases?
• Stores use them to keep track of inventory
• Travel Agents can keep up with their customers and reservations
•Hospitals track
patient information
• Customers online when shopping
• Students online when Researching information for school
Advantages of Computerized Databases Can find a specific file quickly Can alphabetize and sort data faster than
people Is as accurate as the data that is entered Can make many different types of reports
DatabasesDatabase application
A program used to create databases and programs to track and manage information
Ex. Microsoft AccessDatabase Objects
The parts of a database, such as tables, forms, reports and queries
Table a collection of data about specific subjects
arranged in rows and columns Query
a set of instructions that retrieves data from one or more tables
Databases
Form an onscreen display where data can be added
or changed Report
a presentation of data formatted and organized for printing
Databases
Parts of a DatabaseFile
A collection of recordsRecord
Is a database file, containing multiple fields.
Parts of a Database Field
A category of information, the label at the top of the column that describes the kind of information to be stored in the column
Entry the information that is entered in the fields in a
database Layout
refers to the specific order and manner in which information is presented
Parts of a Database
COMPUTER BRAND
PROCESSOR MGHZ RAM
Dell Pentium III 2 256
Gateway Pentium II 550 128
IBM 486 66 16
Compaq Pentium I 75 24
Parts of a DatabaseRecord Number
the number that identifies the sequence of a record in a database
Data Type defines the type of information
which may be stored in a field.
Data Types Date and Time
used for storing dates and times in a specific format to allow you to know the age of an account or the time of an event
Logical can be one of two entries, Ex. YES or
NO, TRUE or FALSE, ON or OFF
Data TypesMemo
used for information that does not fit easily into a category, such as notes or comments
Numeric stores only numeric information
Data TypesText
stores alphanumeric information, also called a character field
Objectstores media information such as a
picture, clip art, a sound file, or any other non-text information
DatabaseFiles
RecordsFields Data Types
Entry Logical
Memo
Date and Time
Numeric
Text
Object
Using a DatabaseData Entry
the process of manually inputting data into a database program.
Can create field names and data types
Add and delete fields as neededOrganize information as desired
Searching a Database Search
to ask the database to look at all records which contain certain information or meet certain criteria.
Retrieve to find one or more specific records
Sort organizes the information in either ascending
or descending order
Mathematical Operators
> Greater than
< Less than
= Equal to
>= Greater than or equal to
<= Less than or equal to
<> Not equal to
How to Search Boolean
A particular way of searching a database. Boolean uses the words AND, OR, NOT. Ex. Cat AND Maine Coon
Keywords the terms you are searching for when you use
a database
How to Search
CriteriaConditions that are set in a Query
Filter To separate out and show records that have a
specific value
Creating a Database
Create Field Names and Data Types Enter Data Adjust Fields widths as needed Add or Delete Fields as needed Save the Database
Manipulating a Database
Retrieve a Database File Sort the Database File Filter/Query/Search the Database
Use questions that involve one to three criteria
Use questions that change the connecter from AND to NOT to OR
Manipulating a Database
Create a Report Name a Report Choose a Layout Choose Fields to Include Determine Sort Order Create a Filter
Database Views
Datasheet/List View – displays the table data in a row-and-column format. Used to enter data. Displays several records at one time.
Design View – place to create field names and data types for a database.
Form view – used to display/design one record at a time and/or to enter information. Can include pictures, borders, or special
formatting.
Printing a Database
Print the DatabaseChoose page orientationChoose whether you desire to print
gridlines, record, and field labelsPreview and adjust as neededPrint the database