The Boolean operator, OR, is used to broaden a
search.
Or is used to combine search terms of similar
meaning. It is particularly useful when there are many appropriate
terms that could be used to search one concept. Consequently using
or will make your search broader and should retrieve
more records.
Or searches for either of the words in the same
record.
'OR'
chocolateorcarob finds all
records containing either chocolateorcarob or both, producing a broader result.
AND finds documents in which both words occur.
AND retrieves fewer records ie.
gives a narrower result.
'AND'
chocolate and adolescents finds records
in which both chocolate and adolescents
occur.
And retrieves fewer records ie.
gives a narrower result.
