(See the 'Parentheses/Nesting' tab above for more details. Take care when using OR - sometime it is necessary to use parentheses in conjunction with OR in order to get the search to run correctly.This can be a good choice when your search topic word has several synonyms and you aren't sure which one will be used in the documents you seek.Instructs the search engine to bring back results that contain either one search word OR the other - it will bring back results containing either word - so will usually end up bringing back more results.Take care when using this one - results containing the search terms you are interested in may be left out of your results if you are using NOT - simply because they also happened to contain the unwanted search term.īoolean operators that help you broaden your results:.Instructs the search engine to NOT bring back any results that contain a specific search word.Databases usually recognize AND as the primary operator, and will connect concepts with AND together first.They connect your search words together to either narrow or broaden your set of results. Instructs the search engine to only bring back results that contain BOTH search words Boolean operators form the basis of mathematical sets and database logic.The three basic boolean operators are: AND, OR, and NOTīoolean operators that help you narrow your results: ![]() They connect your search words together to either narrow or broaden your set of results. Choose the most significant words that describe your topic and connect them together using Boolean operators or proximity operators. Example: Title keyword out 'of' africa retrieves title: Out of Africa. Some databases use quotes around stop words. Terminology Note: Sometimes youll see terms and connectors searches called 'Boolean searches.' Technically, Boolean searching just means use of AND, OR, or NOT, but its sometimes used to refer to all the other search operators too (like the proximity operator /p). using Boolean Operators in between your search words, is the single most effective 'advanced' search technique you can use to improve your search results, making them more relevant and precise. In some databases, you can use techniques to include stop words as part of the search.
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