Information
searching in most database is based on the principle of Boolean logic (the
logic of relationship among terms)
(AND,
OR, NOT)
Boolean
operators improve search result by broadening, narrowing and excluding search
results
OR Operator
OR
operator broadens search result.
Eg.
Search black OR picture cards
As
a result you will get cards that contain one of the given search term or both
AND Operator (+)
AND
operator tends to narrow a search and make it focused. The more concepts
combined in a search with AND logic, the fewer records will be retrieved.
Eg.
search red AND picture cards
From
this search you will find cards that contain both the given search terms.
NOT Operator (-)
NOT
operator exclude documents that contain the keywords a searcher would not like
to appear in the documents.
Eg.
Search black NOT picture cards
From
this search you will exclude unwanted cards and find only not pictured black
cards
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any suggestion on my side