Be aware: In many, but not all, databases, the AND is implied.
Databases follow commands you type in and return results based on those commands. Be aware of the logical order in which words are connected when using Boolean operators:
|Records that have the search term anywhere within them
|Records that have the search term in the subject headings part of that record
|Depending on the terms you use, searches may retrieve no results or thousands. Searches with general terms often return many results
|Varies widely. Some searches will retrieve hundreds of results, but, if you choose a nonexistent term, you will get none
|Varies. Results may be completely unrelated to your topic. For example, a search for "Philadelphia" returns records for every book published by the University of Pennsylvania Press regardless of whether the work is about Philadelphia
|High as long as you identify the correct subject for your topic
|High: Terms can be combined in complex ways to design effective searches
|The flexibility of your search is limited by the manner in which subjects are structured in the database you are searching
Truncation, also called stemming, is a technique that broadens your search to include various word endings and spellings.
Similar to truncation, wildcards substitute a symbol for one letter of a word.