Element Operators

Handle situations where:

• Detect the presence or absence of a field.

• Different value types in the same field.

📌 $exists

List documents that have a specific field. The value for this operator can be true or false.

db.movieDetails.find({“mpaaRating”: {$exist: true}})

If you use a filter to check the null value, to list documents that either have that field set to null or do not have that field.

📌 $type

List documents that have a field with a specific type of value.

db.movieDetails.find({“viewerRating”: {$type: “int”}})