Skip to Main Content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.

Nursing: Boolean Operators

Boolean Operators

Boolean operators are based on algebraic system of logic formulated by George Boole (1815-1864), the British mathematician (if interested check out his bio here ). You use the operator (aka conjunctions) AND, OR , NOT to narrow or broaden your search. You don't need to capitalize the operators; it's just a librarian thing to do! ;-)

AND  -- is the intersection of terms; AND narrows your search. It tells the database that ALL words must be present in the results

OR -- is the union of terms; OR broadens your search. It tells the database that any of the terms can be present in the results. Think of synonyms or similar terms when you are OR - ing your terms.

NOT -- is the elimination of terms. NOT narrows your search but it ignores certain terms. It tells the database to ignore specific term or concept in the results.

Boolean Operators -- the PBJ way!!

Boolean Operators -- The Pirates vs Ninja Way!


Profile Photo
Mou Chakraborty