Introducing Simple Operators in Visual Studio .NET

Create QR-Code in Visual Studio .NET Introducing Simple Operators

Operators are used in conjunction with Google search terms and have a special meaning to Google They are not included in the subject of a search, but rather change how Google works when it performs a search Thus, the operator AND signifies that two words should be searched for together The operator OR looks for one term or another to show up in the search results I talk about AND, OR, +, and operators in this section Although words entered as Google search terms are not case sensitive, Google operators are You must type AND or OR You cannot enter them as and or or (Alternatively, you can use the pipe operator, | , as the OR operator)

Google uses a rather simplistic set of query operators that do not correspond completely to standard Boolean or SQL systems (For more information about Boolean operators and Boolean logic, try searching for those terms on Google SQL, or Structured Query Language, is used for interacting with databases)

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For example, in contrast to traditional Boolean operators, Google doesn t provide a negation operator as such Google does have an exclusion operator (see the section called The exclusion operator for more details) In other words, with Google you can match results to a search if any of the search terms appear in the pages (see the section called The OR operator ), but you can t create an exclusive, or match in which the search matches if the result contains one, and only one, of the search terms In other words, Google doesn t allow you to do a search for either bananas or gorillas that does not exclude pages that have both bananas and gorillas on them With Google, simplicity is the name of the game Keeping the search operator syntax simple means that searches are speedier, but you don t get the full spectrum of operators that are available with other engines The average Google user probably doesn t need to worry about operators at all; but as a researcher, you do; Google s limited syntax means that you must use what they ve given you with as much skill as possible

The AND search operator is the explicit conjunction operator that tells Google that the terms on either side of the AND operator should be included in search results By default, even if you don t use an operator, Google provides search results for multiple keywords as if you d used the AND operator (this fact explains why AND isn t used too often) However, using AND instead of the implicit conjunction makes it clear what is going on and makes it easier to transfer your results to a search engine (or database) that does require the explicit use of an AND operator (such as an SQL-driven database)

When you use the OR operator, you tell Google, Match any of the terms connected by the OR operator (as oppose to AND, which requires all the terms to appear in search results) One of the best uses of the OR operator is when you re not quite sure of the spelling of a term (looking for autochthonous ), or when the term has several variations (email OR e-mail) Or perhaps you want to include both singular and plural forms of a word (ant OR ants) Sometimes OR works if an item is known by more than one term For example, the search

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Figure 4-5: The OR operator returns results that include any of the terms joined using the OR operator

returns pages that contain the words wireless and device or wireless and computer or wireless and network (wireless and any two or three of the other terms) as you can see in Figure 4-5 In any event, the word wireless appears in the results