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Logical Function

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Last updated: 2024-01-22 10:52:48
This document introduces the basic syntax and examples of logic functions.

Logical operators

Operator
Description
Example
AND
The result is TRUE only if both the left and right operands are TRUE.
a AND b
OR
The result is TRUE if either of the left and right operands is TRUE.
a OR b
NOT
The result is FALSE only if the right operand is FALSE.
NOT a
The following truth tables demonstrate the processing of cases where a and b are TRUE, FALSE, and NULL:
AND and OR truth table
a
b
a AND b
a OR b
TRUE
TRUE
TRUE
TRUE
TRUE
FALSE
FALSE
TRUE
TRUE
NULL
NULL
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
FALSE
FALSE
FALSE
FALSE
NULL
FALSE
NULL
NULL
TRUE
NULL
TRUE
NULL
FALSE
FALSE
NULL
NULL
NULL
NULL
NULL
NOT truth table
a
NOT a
TRUE
FALSE
FALSE
TRUE
NULL
NULL

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