With AND, the database knows that you need articles that contain the word Plato and the phrase "good life.".Without AND, most databases assume you meant AND anyway however, some databases may return items that mention Plato, or the "good life," but not both.If you truncate as femini*, you will get feminism, feminist, and also feminine, which may not be on topic.ĪND joins two or more concepts by telling the database that both/all of these keywords must appear in the search results.Įxample: Searching for Plato's idea of the good life.When you truncate as feminis*, you get both feminism and feminist.īe careful of truncating too early in the word itself.Without truncation, you get only feminism, but not feminist.The asterisk (*) is a kind of wild card that tells the database to find multiple "endings" of a word. It won't bring up "geese wild," or "wild animals, such as Canadian geese." With quotation marks, the database ignores articles that do not contain the exact phrase "wild geese".You might get search results about how well domestic geese survive in the wild. Without quotation marks, the database finds the word wild and the word geese separately.Quotation marks tell the database to take the phrase as a whole, and search for the words together, and in order. Now let's go into a little more detail about each operator. 6 - Citing Information Sources Toggle Dropdown What Does the Information Source Tell You About Itself?.5 - Evaluating Information Sources Toggle Dropdown Citation Chaining (or Reference Mining).Refining Results by Date, Peer Review and Document Type.Information Sources for Different Audiences and Purposes.Current and Retrospective Information Sources.Primary, Secondary and Tertiary Information Sources.Scholarly, Popular and Trade Information Sources.
2 - Understanding Information Sources Toggle Dropdown Getting Background Information About Your Topic.Turning A Topic Into A Research Question.1 - Developing Research Questions Toggle Dropdown In this Google "Advanced Search," the OR is stated clearly, but the AND and NOT operators are there nonetheless. However, the Boolean concept does still apply. Searching text on Web pages is much less exact than querying records in a database, and this search actually produced 10 million results. List for degree="MBA" and language="Spanish" or language="French" However, the OR separates French from the rest of the query, and anyone speaking French, no matter which degree they held, would also be selected. The AND ties MBA and Spanish together therefore, people who speak Spanish and have an MBA would be selected, which is correct. In the following example, the parentheses are missing, and the query is incorrect. List for degree="MBA" and (language="Spanish" or language="French") Spanish and French are placed in parentheses in order to be treated as a single item. For example, the request: "Search for all Spanish and French speaking employees who have MBAs" would be written as follows if the query were expressed on a command line. This article is provided by FOLDOC - Free Online Dictionary of Computing ( ) Boolean searchA search for data that meets several criteria by using the Boolean operators AND, OR and NOT (see Boolean logic).
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