When searching online databases, you often get too many or too few results. Identifying keywords or phrases and then connecting them using Boolean operators (AND, OR, and NOT), along with the other ...

Boolean operators must be ALL CAPS. ... This is equivalent to a union using sets. For example, to find documents that match either "treatment" or "medication," you can use the search: ...

And secondly, mastering the basics of creating Boolean queries doesn’t require any technical background at all. Boolean terms explained. Before creating your first query, you should get comfortable ...

The following are examples of prefix operators used with variables, constants, functions, and parenthetic expressions: +y-25 -cos(angle1) +(x*y) An infix operator applies to the operands on each side ...

Google has quietly removed the Boolean + operator from its search options–and replaced it with expanded quotation mark functionality. For those who don’t use Boolean search operators, this isn ...