Boolean Operators: AND, OR, & NOT
What are boolean operators?
The three basic boolean operators, AND, OR, & NOT, are used to create relationships between your search terms to either narrow or broaden your search results.
How boolean operators work
AND - Narrows your results by finding records with all of your search terms. Use AND to connect two or more different concepts.
OR - Broadens your results by finding records with one term or the other, or both terms. Use OR to connect two or more similar concepts (synonyms).
NOT - Narrows results by finding records that include the first term, but not the second. Use NOT to ignore concepts that may be implied by your search terms, but are not what you are looking for.