MongoDB OR Operator

Mongodb provides $or operator to perform logical OR operation. It checks whether any of the specified condition match in the document or not.

Syntax of $or

{$or : expressions}

It returns the data that satisfy at least one of the expression.

Example

Suppose, we have following collection.

{ "_id" : ObjectId("5b7ddc4f529cbc23546dc4c7"), "name" : "Jorz Rai", "age" : 10, "class" : "5A" }
{ "_id" : ObjectId("5b7ddf10529cbc23546dc4c8"), "name" : "Rana Soi", "age" : 11, "class" : "5C" }
{ "_id" : ObjectId("5b7de0f4529cbc23546dc4c9"), "name" : "Andy Joya", "age" : 11, "class" : "5C" }
{ "_id" : ObjectId("5b7de0f4529cbc23546dc4ca"), "name" : "Mary Soi", "age" : 11, "class" : "5C" }
{ "_id" : ObjectId("5b7de0f4529cbc23546dc4cb"), "name" : "Priska Somya", "age" : 12, "class" : "6A" }

The given statement returns all those students either whose age is 11 or class is 5C.

db.students.find({"$or" : [{"age" : 11}, {"class" : "5C"}]});