MongoDB Query Language (MQL) Set Expression Operators
Set expression operators perform operations on sets and arrays treated as sets.
$allElementsTrue
The $allElementsTrue operator returns true if all elements in an array evaluate to true.
$anyElementTrue
The $anyElementTrue operator returns true if any element in an array evaluates to a value of true.
$setDifference
The $setDifference operator returns a set with elements that exist in one set but not in a second set.
$setEquals
The $setEquals operator returns true if two sets have the same distinct elements.
$setIntersection
The $setIntersection operator returns the common elements that appear in all input arrays.
$setIsSubset
The $setIsSubset operator determines if one array is a subset of a second array.
$setUnion
The $setUnion operator returns an array that contains all the unique elements from the input arrays.