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Boolean Searching: Using the NOT operator

Boolean logic defines logical relationships between terms in a search. The Boolean search operators are AND, OR and NOT. You can use these operators to create a very broad or very narrow search.

Example

Credit

Permission from Laura B. Cohen was received to use the Boolean circles in this LibGuide.

NOT

cats
not
dogs

 

If you type the above search example in a database search box, the results will bring up articles about cats. Any articles that mentioned cats along with dogs in them would not be in the results because this search asks that "dogs" be excluded.

Subject Guide

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Diane Baker
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