logical expressionA combination of items, system items, system variables, literals and arithmetic logical operators from which a value of TRUE or FALSE is derived; for example, ...
logical expression
A string of numbers, constants, variables, operators, and functions that returns a value of true or false. Referenced by: Visual Basic.
logical network ...
A boolean operator is a keyword that specifies how to combine simple logical expressions into complex expressions.
logical connector One of the reserved words AND, OR and XOR used to build complex logical expressions in a query.
[spatial analysis] A statement or logical expression that selects geographic features based on location or spatial relationship.
Note that we could accomplish the same thing by entering a logical expression into the map calculator such as:
[sled_slopes] = 1 & [public] = 1
The result will be a grid having a value of 1 (true) for each cell that meets the logical criteria.
SQL
STRUCTURED QUERY LANGUAGE A standard language used with relational database products which enables the user to build complex logical expressions identifying the data to be recalled and manipulated.
This means that students have to experience that such a problem needs careful reflection about data to be used, about threshold values to be taken into account, about the syntax of the logical expression to be ca lculated before they can take action ...
A query usually appears in the form of a statement or logical expression. It can contain a field, an operator, and a value.
93 Structured Query Language; a standard interface for access to a relational database through queries that select records matching logical expressions. stand p.
 See also: Expression, Geographic, Location, Relation, Network
  
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