Name    Description
$eq        Matches values that are equal to a specified value.
$gt        Matches values that are greater than a specified value.
$gte    Matches values that are greater than or equal to a specified value.
$in        Matches any of the values specified in an array.
$lt        Matches values that are less than a specified value.
$lte    Matches values that are less than or equal to a specified value.
$ne        Matches all values that are not equal to a specified value.
$nin    Matches none of the values specified in an array.