Search Operators

Query Selectors#

$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.
$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.
$in Matches any of the values specified in an array.
$nin Matches none of the values specified in an array.

Logical#

$or Joins query clauses with a logical OR returns all documents that match the conditions of either clause.
$and Joins query clauses with a logical AND returns all documents that match the conditions of both clauses.
$not Inverts the effect of a query expression and returns documents that do not match the query expression.
$nor Joins query clauses with a logical NOR returns all documents that fail to match both clauses.

Element#

$exists Matches documents that have the specified field.
$type Selects documents if a field is of the specified type.

Evaluation#

$mod Performs a modulo operation on the value of a field and selects documents with a specified result.
$regex Selects documents where values match a specified regular expression.

##Array

$all Matches arrays that contain all elements specified in the query.
$elemMatch Selects documents if element in the array field matches all the specified $elemMatch conditions.
$size Selects documents if the array field is a specified size.

Example#

{
  "qty": { "$gt": 0 }, // for quantities greater than zero
  "discontinued": 0, // and not discontinued
  "$or": [
    { "description": { "$regex": "new" } }, // that has the word "new" in it
    { "description": { "$regex": "hot" } } // that has the word "hot" in it
  ]
}

tip

For matching operators with MongoDB you can read more here