Write a query to fetch specific fields using MongoDB projections

Question

Can you help me to Write a query to fetch specific fields using MongoDB projections.

Answer 1

Fetching Specific Fields Using MongoDB Projections

MongoDB projections allow you to retrieve only the required fields from a document instead of fetching the entire document. This improves query performance by reducing data transfer and memory usage.

Best Approach

Use the find() method with a projection object to specify the required fields.

Syntax:

db.collection.find(query, { field1: 1, field2: 1, _id: 0 })

Example: Fetch Only name and age Fields from the users Collection

db.users.find({}, { name: 1, age: 1, _id: 0 })