DATABASES
DEFINITIONS: What is a database? an organized collection of related information. File: A database file is made up of related records in a database. Field: A category of information in a database. Record: A row of completed fields
Computerized Databases you may be familiar with include: Destiny Library Catalog Amazon.com, E-Bay and other on-line shopping web sites Cell Phone Contact List MP3 Play List iTunes Store Music & Apps
Advantages of Computerized Databases Can alphabetize and sort data fast Can find a specific file quickly Can filter/search for specific types of information Can make many different types of reports
Who uses computerized databases in the real world? Stores use them to keep track of inventory Travel agents can keep up with their customers and reservations Hospitals track patient information Schools to keep track of student information, attendance & grades
method of sorting data in order from lowest to highest Alphabetical (A-Z) or Numerical (0-9) Ascending order: the opposite of ascending order - highest to lowest Reverse Alphabetical (Z-A) or Reverse Numerical (9-0) Descending order:
The process of finding all records of a database that meet a criterion or mathematical statement. QUERY (SEARCH/FILTER) =plaid <$29.95 <>12 COLOUR COST GRADE
less than (<) greater than (>) equals (=) MATHEMATICAL RELATIONSHIP S The comparison of two pieces of information using logical operators: Operators: Mathematical symbols less than or equal to (<=) greater than or equal to (>=)
Words such as and, or, not join certain conditions together when performing a query. Multiple Criterion Filter : A database operation that displays records that meet several criteria simultaneously. Connectors : Example, Between 20 and 25 years of age >20and<25
Wildcard: A character in a search that permits any character to be specified. In a database search, the asterisk (*) is the wildcard character to replace one or more letters Like S* will locate all records that begin with the letter S
QUESTIONS???
Let’s work with a database together... LOAD MSACCESS and open the file called Tool Inventory from the shared drive – Productivity Software Databases