MongoDB — Aggregation Pipeline Introduction

🍃 MongoDB 7.0+ 🟢 Chapter 31 of 50 📂 Phase 07: Aggregation Framework Pipeline 📅 2026 Edition

Learn how MongoDB Aggregation Pipeline transforms documents through multi-stage data processing pipes.

1What is the Aggregation Pipeline?

The Aggregation Pipeline is a framework for data aggregation modeled on data processing pipelines. Documents enter a multi-stage pipeline that transforms the documents into aggregated results.

Basic Pipeline Example

db.orders.aggregate([
  // Stage 1: Filter active orders
  { $match: { status: "completed" } },
  
  // Stage 2: Group by customerId and sum total spend
  { $group: { _id: "$customerId", totalSpent: { $sum: "$total" } } },
  
  // Stage 3: Sort by totalSpent descending
  { $sort: { totalSpent: -1 } }
]);

Written by Our Compiler Technical Editorial Team
Reviewed for accuracy & tested on MongoDB 7.0+ Standards · Last updated August 2026