con*al retrieves documents which start with "con" and end in "al", such as "congressional" and "confessional". … Placing quotation marks around a search term or phrase limits your search to that exact term or phrase. Let’s discuss an easy way to solve both these tasks. Use a fuzzy search. Boolean Operators. The use of parentheses is recommended to isolate expressions in your query from other expressions, especially when creating complex queries using proximity operators and field operators. Jump to: Metadata Field Operators │ List of Common Field Operators │ List of Collection Codes │ Searching MODs Metadata.
The result of x | y is true if either x or y evaluates to true. edit
See our guide to Boolean Search Operators. In the following example, the right-hand operand of the | operator is a method call, which is performed regardless of the value of the left-hand operand: The conditional logical OR operator || also computes the logical OR of its operands, but doesn't evaluate the right-hand operand if the left-hand operand evaluates to true. Therefore, the asterisk is a time-saver so you don't have to write out long, complicated search terms. Returns True when either Expr1 or Expr2 is true.
Because null represents an unknown value, the result of any comparison with a null value is also unknown.
title:hearing retrieves documents where the word "hearing" occurs in the title of the document, title:environment and member:mikulski retrieves documents with the word "environment" in the title and "mikulski" in the member field, title:(hearing or meeting) retrieves documents with either "hearing" or "meeting" in the title field, title:chesapeake bay retrieves documents with the word "chesapeake" in the metadata title field and the word "bay" in the document, title:"chesapeake bay" retrieves documents with the phrase "chesapeake bay" in the metadata title field, title:(chesapeake bay) retrieves documents with both the word "chesapeake" and the word "bay" in the metadata title field, but not necessarily in order, title:chesapeake and title:bay retrieves documents with both the word "chesapeake" and the word "bay" in the metadata title field, but not necessarily in order, title:chesapeake title:bay retrieves documents with both the word "chesapeake" and the word "bay" in the metadata title field, but not necessarily in order, congress:range(100,105) retrieves documents for all congresses with numbers 100 up to and including 105, publishdate:range(2006-01-01,2006-07-01) retrieves documents with an issue date from January 1, 2006 through July 1, 2006, publishdate:range(2006,2006) retrieves documents with an issue date from Jan 1, 2006 through December 31, 2006, congress:range(,105) retrieves documents with all congresses up to and including the 105th, publishdate:range(2006-01-01,) retrieves documents with all issue dates after and including 2006-01-01. Boolean Search is a search process that allows you to broaden, limit, and define your search options by adding Boolean Search Operators or Modifiers. A user-defined type cannot overload the conditional logical operators && and ||. Java supplies a primitive data type called Boolean, instances of which can take the value true or false only, and have the default value false. The field must be a valid field name or a Field Error will be reported. Otherwise, the result is false. Lists of collection-specific metadata field operators are available under the What's Available section. and ^ operators with bool? For complex queries using operators, the following should be noted: To search for only those documents that contain both the words Bill and Clinton, you can enter Bill Clinton into the Search Box and click the Search button. "congressional hearing" retrieves Documents with the word "congressional" directly followed by the word "hearing".
Returns True when either Expr1 is true or Expr2 is true, but not both.
For example, searching for software engineer will return results that contain the keywords "software", "engineer", and "software engineer". For example, entering and or AND will return the same results. By using our site, you
If either x or y evaluates to true, x | y produces true (even if another operand evaluates to null). For operands of the integral numeric types, the & operator computes the bitwise logical AND of its operands.
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