![]() Most job boards will recognize the asterisk, but not all search engines do.Īdmin* = administration, administrator, administer, administered, etc. The asterisk is a time-saver so you don't have to write out long, complicated search terms. The asterisk can be used for a root word, stem, or truncation. The example given returns results that contain both software engineer and software architect. ![]() The keyword(s) within the parenthesis will be given priority. ![]() Parenthesis can be used to combine other Operators for a more complex search. Any result that has the search option you excluded will not show up in your results. Placing NOT between your search keywords excludes the term after NOT from your search. Placing OR between your search keywords or terms will broaden your search results by returning all possible combinations of your search terms. ![]() Placing AND between your keywords will return results that only include both or all your keywords. Without the quotes, your search engine may return all results that contain each separate word. If you don't put in the parentheses, the search statement is processed strictly from left to right, so that the AND is done first. This search strategy will retrieve records containing both of the concepts, Diet Therapy + Bulimia, or any records with the concept Anorexia.Placing quotation marks around a search term or phrase limits your search to that exact term or phrase. For example, diet therapy AND ( bulimia OR anorexia ) will retrieve records containing the two concepts, Bulimia + Diet Therapy, or the two concepts, Anorexia + Diet Therapy, or records that contain all three concepts, Bulimia + Diet Therapy + Anorexia. Searches within parentheses are performed first and operations proceed from left to right. The order in which the operations (AND, OR, NOT) are processed can vary between systems. Use parentheses ( ) to separate keywords when you are using more than one operator and three or more keywords. Nesting, or mixing the Boolean operators, is a way to combine several search statements into one comprehensive search statement. For example, you could search multi-infarct dementia by using Dementia NOT Alzheimer's.īut be careful using this because you would eliminate records discussing both types of dementia, as all articles discussing Alzheimer's are eliminated. The final Boolean operator NOT allows you to exclude concepts not relevant to your search. The more concepts or keywords you OR together, the more records you will retrieve. For example, kidney disease OR renal diseases will retrieve citations using either (or both) terms. This expands your search by retrieving citations in which either or both terms appear. The Boolean operator OR allows you to broaden a concept and include synonyms. Other commands include parentheses, truncation, and phrases. The more concepts you AND together, the fewer records you will retrieve. The most popular Boolean commands are AND, OR, and NOT. For example: "Does taking aspirin cause Reye's Syndrome in children?" This will retrieve citations that discuss all three concepts in each article. Quotes Quotation marks are used when searching for exact phrase that consist of more than one word. There are 3 basic Boolean search operators: 1. When terms/concepts are combined with the AND operator, retrieved records must contain all the terms. Boolean search query modifiers are symbols you can use to organize keywords and further refine your search. (The shading represents the outcome of the Boolean operation.) The circle diagrams that help illustrate the relationships between the sets used in Boolean logic were named after another mathematician, John Venn. This example displays candidates whose current job title has the word finance, who have a bachelors degree in finance or accounting, and who are not currently.
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