mongoDB operator

Query Selectors

Comparison

For comparison of different BSON type values, see the specified BSON comparison order.

Name	Description   (a operator b)
$eq	Matches values that are equal to a specified value. (a=b   :true)
$gt	Matches values that are greater than a specified value. (a>b  :true)
$gte	Matches values that are greater than or equal to a specified   value. (a>=b : true)
$lt	Matches values that are less than a specified value. (a<b   :true)
$lte	Matches values that are less than or equal to a specified value.   (a<=b   :true)
$ne	Matches all values that are not equal to a specified value.   (a =!b  :true)
$in	Matches any of the values specified in an array.   (b includes a   :true)
$nin	Matches none of the values specified in an array. (b doesn't have a   :true)

Logical

Name	Description
$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. (쿼리의 결과를 반대로 뒤집고 쿼리조건에 해당하지 않는 document만 반환한다)
$nor	Joins query clauses with a logical NOR returns all documents that fail to match both clauses. (이 조건에 매치되지 않는 documents만 반환.)

Element

Name	Description
$exists	Matches documents that have the specified field. (특정 field를 갖는 document만 반환)
$type	Selects documents if a field is of the specified type. (특정 타입의 field를 갖는 document만 반환)

Evaluation

Name	Description
$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. 특정 정규식에 맞는 documents를 반환함.
$text	Performs text search. 문자열을 검색함.
$where	Matches documents that satisfy a JavaScript expression. js 식으로 작성한 document를 반환.

Geospatial

Name	Description
$geoWithin	Selects geometries within a bounding GeoJSON geometry. The 2dsphere and 2dindexes support $geoWithin.
$geoIntersects	Selects geometries that intersect with a GeoJSON geometry. The 2dsphere index supports $geoIntersects.
$near	Returns geospatial objects in proximity to a point. Requires a geospatial index. The2dsphere and 2d indexes support $near.
$nearSphere	Returns geospatial objects in proximity to a point on a sphere. Requires a geospatial index. The 2dsphere and 2d indexes support $nearSphere.

Array

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

Bitwise

Name	Description
$bitsAllSet	Matches numeric or binary values in which a set of bit positions all have a value of 1.
$bitsAnySet	Matches numeric or binary values in which any bit from a set of bit positions has a value of1.
$bitsAllClear	Matches numeric or binary values in which a set of bit positions all have a value of 0.
$bitsAnyClear	Matches numeric or binary values in which any bit from a set of bit positions has a value of0.

Projection Operators

Name	Description
$	Projects the first element in an array that matches the query condition.
$elemMatch	Projects the first element in an array that matches the specified $elemMatchcondition.
$meta	Projects the document’s score assigned during $text operation.
$slice	Limits the number of elements projected from an array. Supports skip and limit slices.

• Twitter
• Facebook
• Google
• Tumblr
• Pinterest