What's
a Boolean Operator??
Or
Some Tips for Searching Databases
Master
these 5 tips and you too can be an Expert.
1)
Start with the right DATABASE (db).
Sounds
basic, but if you are looking for articles on Hamlet,
donít search GeoRef. Read the db description before
you search.
2)
Focus your search on words in specific FIELDS in the
db record.
Learn
how to use fields to search for keywords. This is referred
to as precision searching. Each record in a database
consists of a set of specific fields. Each field contains
specific information and that info is searchable using
the appropriate field name. A search that looks for
keywords in the subject or descriptor fields retrieves
only those records in which the keyword is a major focus.
Most dbs use "controlled vocabulary" in subject fields.
The Coe Library Catalog uses the Library of Congress
Subject Headings in its subject fields. For more
information, Use db HELP.
3)
Use LIMIT to weed out less-than-useful records.
Find
out how to limit your search to a range of years, English
language records, journal articles, etc. This again
gives you a more precise set of records to look through.
For more information, Use db HELP.
4)
Combine search words by using OPERATORS.
Operators
are words (AND, OR, NOT, WITH, NEAR) and symbols <
( ), +, -, " " > that affect the results of your
search. These are the famous BOOLEAN OPERATORS named
for George Boole, a specialist in mathematical logic.
Using these words or symbols will affect the results
of your searches in specific ways. AND, OR, NOT
will expand or restrict your search results. WITH
and NEAR are called proximity or adjacency operators
because they specify the closeness of search words to
each other. The search "chick with peas" will retrieve
only those records in which the words "chick" and "peas"
occur next to each other. Using PARENTHESES specifies
the order in which multiple words are searched by a
computer. The search "onions and (peas or beans)" would
be carried out in the following order: (peas or beans)
would be processed first; that set would then be combined
with onions. The usual order without the parentheses
would be left to right. You can do phrase searching
in some dbs by surrounding a phrase with quotation marks.
Augggghhhh: Enough with Operators !!!!!!!!!! Use db
HELP.
5)
Use TRUNCATION to expand your search.
Truncate
(or shorten) keywords to search for various forms of
a word. Each database you search uses a symbol
to indicate truncation. Find out what that symbol is
so you can quickly search for plurals and other forms
of your keyword. But be careful. Three letters
or less do not usually constitute a useful word root!
Pea is the word root for peas - and peace, peach, peak,
peal, peanut, pear, pearl, peas, peasant and peat.
Use a dictionary AND db HELP. |