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Boolean Logic Combining Searches in a Database We’ll start out with a subject search on electronic commerce.

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Presentation on theme: "Boolean Logic Combining Searches in a Database We’ll start out with a subject search on electronic commerce."— Presentation transcript:

1 Boolean Logic Combining Searches in a Database We’ll start out with a subject search on electronic commerce

2 This search needs to be narrowed. We need to add another topic. It’s not practical to skim so many citations. Plus with this much information your paper/report wouldn’t have much focus Too Many Records--Need to Narrow Search

3 Let’s add another topic to our research: the automobile industry. By itself this subject heading retrieves 17108 citations. What we’re ultimately looking for is the use of electronic commerce in the automobile industry. Add Topic Automobile industry

4 We use AND to combine both our topics Combine Both Topics

5 The combination (or intersection) of these topics equals 110 records. AND Narrows Records Retrieved

6 You can see both subject headings listed here. Look at Listing of Subject Headings

7 Combine Search Topic with a Specific Journal Combining your search topic with articles from a particular journal is also a useful technique. You can restrict your search this way to journals that you know are in Feinberg Library. Try to figure out the field name that a database uses to indicate journal name. In this database it’s source.

8 You can see all these articles are from the journal Harvard Business Review Search Restricted to One Journal

9 Two Topics in a Specific Journal In this search we’re combining the topics hotels and motels with cost control. We use another AND to combine it with Cornell Hotel and Restaurant Administration Quarterly.

10 Search Results You can see these articles include both our subjects and are in the journal we specified.

11 Lexis-Nexis Basics Lexis-Nexis is a full-text database This database doesn’t use controlled vocabulary This database doesn’t have keyword or subject heading searching If you search using the “basic search” your search will search through the full text If you’re not careful, you will retrieve too many records

12 Guided Search in Lexis-Nexis This option allows you to search for you words in only the headline or headline and first paragraph This allows you to be more precise Guided search allows you to avoid searching through the full-text

13 Guided Search Click this tab

14 Guided Search You can restrict you search to Headline or Headline and Lead Paragraph. Also note date of publication or journal name options.

15 Search Results Look for Internet Banking and security in the records.

16 Other Info in Lexis-Nexis Don’t forget to look at the other parts of the Lexis-Nexis business database such as: –Company Financial –SEC Filings and Reports –Industry and Market Some of these areas will be useful for your Final Project


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