MongoDB Tutorial 0/120 lessons ~6 min read Lesson 47
Aggregation Pipeline
The pipeline is the sequence of stages your data flows through.
Course progress0%
Focus
3 guided sections
Practice signal
Examples included
Career prep
Foundation builder
Introduction
The pipeline is the sequence of stages your data flows through. Order matters: $match early to leverage indexes, $project early to shrink documents, $group after filtering.
Syntax reference
js
[ { $match }, { $project }, { $group }, { $sort }, { $limit } ]
Best practices
- Push
$matchas early as possible. - Project away big fields before
$group.
Ready to mark this lesson complete?Track your journey across the entire course.