AND NOT, or just NOT depending upon the service, specifies that the first term must appear in a record, but the second term may not. Use AND NOT to exclude unwanted information. When two search terms are close together in the text, the relationship between them is stronger and the document will likely be more relevant for the topics. This is a very good way to find lengthy or more in depth discussions of a topic. Searching within Segments or Fields Fields are distinct portions of the article such as title, lead paragraph, author, or journal name.
Some databases have additional fields for company name, subject or geographic area.
Most periodical databases on the web have pull-down menus for field searching. You can also use field codes in the search expression. For instance, if an article is focusing on the restaurant Iguana Cantina, the company name will be mentioned in the title, the first paragraph or company field. The search screen often has date selection options below the box where you enter search terms. In some programs, it can be built into the search statement.