Boolean Aggregation Operators¶

Boolean expressions evaluate their argument expressions as booleans and return a boolean as the result.

In addition to the false boolean value, Boolean expression evaluates as false the following: null, 0, and undefined values. The Boolean expression evaluates all other values as true, including non-zero numeric values and arrays.

Name	Description
`$and`	Returns `true` only when all its expressions evaluate to `true`. Accepts any number of argument expressions.
`$or`	Returns `true` when any of its expressions evaluates to `true`. Accepts any number of argument expressions.
`$not`	Returns the boolean value that is the opposite of its argument expression. Accepts a single argument expression.

← $indexStats (aggregation) $and (aggregation) →

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