$type

Lesson in the MongoDB Roadmap · Stage 6: Performance Optimization

Last updated 14 September 2026

What is $type?

The $type operator in MongoDB selects documents based on the BSON data type of a specified field. It accepts either BSON type numbers or string aliases like "string", "int", "array", "object". $type is useful for data validation, schema analysis, and filtering documents by field data types, especially when working with collections containing varied or dynamic schemas.

Study this in the interactive course See the whole MongoDB roadmap

Free resources to learn $type

Official docs$\type
Official docsAggregation Operators
Official docsBSON Types

$type: common questions

Can I learn $type 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 $type 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 $type tutorial for beginners?

It is lesson 66 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.