Boolean Operators: Boolean logic is a system that allows a searcher to set relationships between keywords or concepts when searching. The most commonly used Boolean commands are AND, OR, and NOT. Using these operators can make your searches more precise and save time.
Tells the database that you only want articles that contain ALL of the search terms
Tells the database that you want all articles that contain EITHER of the terms
Tells the database that you do not want any articles that contain a certain term
(Smoking OR Nicotine) AND cancer
Tells the database that you want articles with EITHER of two terms AND another
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