Boolean Operators Are You Connected Presented by Insert

Boolean Operators Are You Connected? Presented by: (Insert Your Name Here)

What Are Boolean Operators? q Boolean operators are also known as Boolean connectors. They form the basis of mathematical sets and database logic. q Venn diagrams are graphical forms of Boolean operators. q Search engines use Boolean connectors to broaden, refine, or narrow search results.

Who Was George Boole? q George Boole (1815 – 1864) was a self-taught mathematician. His work with mathematical logic, algebra, and the binary code numbering system of 0 and 1, had a unique influence upon the development of computers. q Boolean operators or connectors are named after Mr. Boole and his work in mathematics.

Boolean Operators Include: Boolean operators include the keyword search connectors: AND, OR, NOT. q AND q OR q NOT

AND, OR, NOT q AND is a connector that requires both words to be present in each record in the results. Use AND to narrow and refine your search. q OR is a connector that allows either word to be present in each record in the results. Use OR to broaden or expand your search. q NOT is used to limit searches by eliminating terms from a search. Using this search restricts a search to increase precision. Use NOT to narrow and restrict your search.

Venn Diagram Examples AND OR NOT

Narrowing The Search q A search for television = 297, 000 results. q. A search for violence = 15, 700, 000 results. q. A search for television AND violence = 490, 000 q. A search for television NOT violence = 1, 040, 000 q. A search for violence NOT television = 1, 240, 000 q. A search for violence OR television = 415, 000

Graphics Courtesy of University Of Canterbury Christchurch, New Zealand http: //library. canterbury. ac. nz

Boolean Connectors Help You. . . q Boolean operators can be used separately or combined together. When used together they are called, “nesting. ” q Eliminate unwanted web page results. q Search and find the results you would expect. q Stay connected.