$eq

Lesson in the MongoDB Roadmap · Stage 6: Performance Optimization

Last updated 14 September 2026

What is $eq?

The $eqoperator in MongoDB matches documents where a field value equals a specified value. It performs exact equality comparison and is the default behavior when using field: value syntax. $eqsupports all BSON data types including nested documents and arrays, enabling precise matching in queries. It's fundamental for filtering documents by specific field values in find operations.

Study this in the interactive course See the whole MongoDB roadmap

Free resources to learn $eq

Official docs$eq
ArticleMongoDB $eq Aggregation Pipeline Operator

$eq: common questions

Can I learn $eq in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain $eq in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this $eq tutorial for beginners?

It is lesson 59 of 106 in the free MongoDB roadmap, in stage 6, Performance Optimization. If you are new to MongoDB, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.