Training
Module
Evaluate Boolean expressions to make decisions in C# - Training
Learn the operators and techniques required to evaluate and compare values in your decision statements.
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Applies to: 
Databricks SQL Databricks Runtime
Returns the logical NOT of a Boolean expression. This operator is a synonym for not operator.
!expr
expr: ABOOLEANexpression.
A BOOLEAN.
> SELECT !true;
false
> SELECT !false;
true
> SELECT !NULL;
NULL