Use Projection to Limit Returned Fields

MongoDB

Technical Specification

Query users but return only name and email, excluding _id if needed.

Input/Output Samples

Input:Find all users

Output:{ name, email } only

Optimal Logic Path

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

Architectural Deep-Dive

Projection helps reduce network payload and hide sensitive fields like passwordHash.