Valeria Urquijo Boolean Operators March 4, 2010

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Presentation transcript:

Valeria Urquijo Boolean Operators March 4, 2010

Index You will see Boolean Creator Operators Or Operator And Operator Not Operator Tips Credits http://www.orbeon.com/download/blog/schema_boolean.jpg

Boolean Creator George Boole an English mathematician Developed an algebra of logic The algebra logic that has become the basis for computer database searches Boolean is named after him http://www.unc.edu/depts/jomc/academics/dri/loc/Boole.jpeg

Operators Boolean uses operators to determine whether a statement is true or false. The most common operators are and, or and not. These three little words can be enormously helpful when doing online searches. http://www.le.ac.uk/li/images/boolean_geol.gif

And Operator And documents search Documents with both words will appear. Example: Hide and Seek Not one ore the other word, but both have to be in the document on the search. http://homepages.uwp.edu/mano/Boolean.jpg

Or operator Or documents search The greatest amount of matches Documents with either Word. Example: Hide and Seek Search results have tu have one of the two words to apear. http://homepages.uwp.edu/mano/Boolean.jpg

Not operator The search will be limited One word would be searched and not the other at all. Example: Hide not Seek Search results with hide word and not at all with seek. Documents with seek will word seek will no appear. http://homepages.uwp.edu/mano/Boolean.jpg

Tips You should take time to read the search tips on the site before using a search engine. Use Boolean operators helped your search and been more accurate with your results. http://blogs.middlebury.edu/csoseniors/files/2010/01/helpful_tips_image.jpg

Tips The four favorite best search engine Google Yahoo! Bing Ask To end Internet may not be the best place to find certain information you can use other resources. http://www.epilepsyfoundation.org/local/massri/images/Quick-Tips_2.jpg

Credits http://www.learnthenet.com/english/html/ 31wsearc_3.htm http://homepages.uwp.edu/mano/Boolean.j pg http://www.le.ac.uk/li/images/boolean_geo l.gif http://www.unc.edu/depts/jomc/academics /dri/loc/Boole.jpeg http://www.orbeon.com/download/blog/sch ema_boolean.jpg