assignment 2 online database(adila dan wani).doc-converted

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IMC 406 – LIBRARY SKILLS II. “OR” Logic Using OR broadens a search to include results that contain either of the words you’re looking for. The OR operator is generally used to join similar, equivalent, or synonymous concepts. IOS ANDROID Example : “Ios” OR “Android” III. “NOT” Logic Using NOT is exclude words from your search. Narrow your search , telling the <strong>database</strong> to ignore concepts that may be implied by your search terms. IOS ANDROID Example : “Ios” NOT “Android”
IMC 406 – LIBRARY SKILLS INTRODUCTION WILDCARD SEARCHING Alternatively referred to as a wild character, a wildcard is a symbol used to replace or represent one or more characters. Wildcards are typically either an asterisk ( ), which represents one or more characters or question mark ( ? ) , Which represents a single character. In the examples below of how a wildcard may be used , realize that wildcards are relatively universal. I. Percent ( % ) in a wildcard The percent symbol is used in SQL to match any character ( including an underscore ) zero or more time. II. Asterisk (* ) in a wildcard The asterisk in a wildcard matches any character zero or more time. For examples “comp*”, matches anything beginning with “comp” which means “comp”, “ complete”, and “computer” are all matched. III. Question mark ( ? ) in a wildcard A question mark matches a single character once. For example, “c?mp” matches “camp” and “comp”. The question mark can also be used more than once. For example, “c??p” would match both of the above examples as well as “coop” in MS – DOS and the windows command line in the question mark also can match any trailing questions mark zero or one times For example, “co??” would match all of the above matches, but because they are trolling question marks would also match “cop” even though it’s not four characters. IV. Open and close brackets ( [ ] ) in a wildcard With Unix shells, Windows PowerShell, and programming languages that support regular expressions the open and close bracket wildcards match a single character in a range. For example, [a-z] matches any character “a” through “z, which means anything not in that range like a number would not be matched.
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