Understanding MongoDB Collections and Documents
MongoDB organizes data into collections that are Similar to tables in relational databases. Each collection contains multiple documents and each document represents a single record and is stored in a JSON-like format.
Let’s set up an Environment:
To understand How to select a single field for all documents in a MongoDB collection we need a collection and some documents on which we will perform various operations and queries. Here we will consider a collection called users which contains the information shown below:
[
{ "_id": 1, "name": "Alice", "age": 30, "city": "New York" },
{ "_id": 2, "name": "Bob", "age": 25, "city": "San Francisco" },
{ "_id": 3, "name": "Charlie", "age": 35, "city": "Los Angeles" }
]
How to Select a Single Field for all Documents in a MongoDB Collections
In MongoDB, retrieving specific data from a collection is a common operation that developers often perform. Whether we are building a web application or running analytical queries, selecting a single field from all documents in a MongoDB collection can provide valuable insights and simplify data processing.
In this guide, we’ll explore how to fetch a single field from MongoDB documents by covering essential concepts and providing practical examples in detail.