Boolean Operators and Other Ways of Narrowing a Full-Text Search
and ...
Boolean operators
used to combine conditions
e.g. WHERE cumgrade > 3.0 AND grade = "A" (selects students satisfying both conditions only) ...
Boolean operators negate a predicate (NOT), specify a combination of predicates (AND), or specify a list of alternative predicates (OR). For example, the use of AND in "DEPTH > 100 and GPM > 500." ...
A Boolean expression contains logical expressions (e.g., DEPTH > 100) and Boolean operators. A Boolean operator is a keyword that specifies how to combine simple logical expressions into complex expressions.
Boolean Operators - The Boolean operators (And, Not, Or, and Xor) use Boolean logic (TRUE or FALSE) on the input values. Output values of TRUE are written as 1 and FALSE as 0.
Common Boolean operators include AND, which specifies a combination of conditions (A and B must be true); OR, which specifies a list of alternative conditions (A or B must be true); NOT, which negates a condition (A but not B must be true); ...
Can you describe them in terms of boolean operators (see the notes for Chapter 13)? Which operation produces two results (rather than one)?
Boolean expression - An expression that contains logical (i.e. true or false) expressions and Boolean operators (i.e. NOT, AND and OR), e.g. HEIGHT > 50 AND DIAMETER < 3.
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The logical overlays can use various logical Boolean operators such as "and" where both condition A and condition B are met, "or" where condition A or condition B is met, and "and not" to idenffy areas where condition A is met, ...
algebra uses the operators AND, OR, XOR, NOT to see whether a particular condition is true or false. Boolean logic represents all possible combinations of spatial interaction between different features. The implementation of Boolean operators is ...
like find the coordinates of a spatial-object column, find the center of a circle-column, find the major and minor axis of an ellipse-column, and setting and updating values of a spatial-object column.
Number of SQL-level boolean operators for ...
 See also: Map, Analysis, Geographic, GIS, Vector
  
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