Describe how the following operators can refine a Web searc

. Describe how the following operators can refine a Web search:

                  a. Quotation marks \" \"

                  b. AND

                  c. OR

                  d. NOT

Solution

a. Quotation marks \" \":

It will halp in searching for phrases.If you type phease as normal you might not get result as you want.For searching phrase,database uses Quotation marks around the phrase nad it will access only those records containing that words in particular order.

b. AND:We can use this if we wnat to narrow doen our search so that all words appears in your result.

e.g.If you want to search on \"exercise and health are important\".

Then it retrive result with \"exercise and health present in reocrds.The more terms you combine with AND logic, the fewer records you will retrieve

c. OR:We can use this if we wnat to expand our search result,so that any word appear in resultmore terms you combine with OR logic, the more records you will find.

E.g.Suppoes you want to search on \"Hotels in USA\".Then you can also use \"Hotels or restaurants in USA\".

It will result more number of records.

d. NOT:It is used when you want to narrow your result by excluding word in your result.

E.g.Happy but Not joy.

It will search records with happy word present in it but it will exclude records with word joy