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- $cond (aggregation)
$cond (aggregation)¶
-
$cond
¶ Use the
$cond
operator with the following syntax:Takes an array with three expressions, where the first expression evaluates to a Boolean value. If the first expression evaluates to true,
$cond
returns the value of the second expression. If the first expression evaluates to false,$cond
evaluates and returns the third expression.