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Advanced Database Searching  

Last Updated: Jul 16, 2014 URL: http://crowder.libguides.com/advanced-database-searching Print Guide RSS Updates

Boolean Searching Print Page
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Parenthetical Searching

Parenthesis are used as they are used in Algebra to force an order of operation.  Use parenthesis to over-ride  the databases natural order of operation.

 

Ebsco, Order of Operation

Auto set is "and" then "not" then "or" Example: trap and mouse or rat not chemical = ((mouse and trap)  or (rat not chemical))
 

Gale, Order of Operation

Auto set is "not" then "and" then "or" Example: Example: trap and mouse or rat not chemical =((rat  not chemical) or (trap and mouse))
 

Proquest, Order of Operation

Auto set is "and" then "or" then "not" Example: trap and mouse or rat not  chemical=((trap and mouse)or rat) not chemical
 

Ebsco

and "and" means you want results with BOTH terms present Example: apples and oranges brings up only results with both apples and oranges in the result.
or "or" means you want results with EITHER one term OR the other. Example: apples or oranges brings up results with either apples or oranges.
not "not" means you want results with one word, but not containing another Example: "Gulf of Mexico" not oil, will bring up results regarding the "Gulf of Mexico", but exclude all results that include the word "oil"
 

Gale

and "and" means you want results with BOTH terms present Example: apples and oranges brings up only results with both apples and oranges in the result.
or "or" means you want results with EITHER one term OR the other. Example: apples or oranges brings up results with either apples or oranges.
not "not" means you want results with one word, but not containing another Example: "Gulf of Mexico" not oil, will bring up results regarding the "Gulf of Mexico", but exclude all results that include the word "oil"
 

Proquest

and "and" means you want results with BOTH terms present Example: apples and oranges brings up only results with both apples and oranges in the result.
or "or" means you want results with EITHER one term OR the other. Example: apples or oranges brings up results with either apples or oranges.
and not "and not" means you want results with one word, but not containing another Example: "Gulf of Mexico" and not oil, will bring up results regarding the "Gulf of Mexico", but exclude all results that include the word "oil"
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