MongoDB 8 · Query and update operators
Check that a field exists
Find documents that have an email field.
db.users.find({ email: { $exists: true } })
Official MongoDB 8 documentation
More query and update operators commands
- Match any of several values
- Combine conditions with OR
- Search with a regular expression
- Match inside an array
- Add to an array
- Remove from an array
All query and update operators commands · MongoDB 8 cheatsheet