How to select a single field for all documents in a MongoDB collection?
In my MongoDB, I have a student collection with 10 records having fields name and roll. One record of this collection is: { … Read more
projection
Retrieve only the queried element in an object array in MongoDB collection
Suppose you have the following documents in my collection: { “_id”:ObjectId(“562e7c594c12942f08fe4192”), “shapes”:[ { “shape”:”square”, “color”:”blue” }, { “shape”:”circle”, “color”:”red” } ] }, { … Read more