MongoDB — Comparison Operators

Equal

db.users.find({ name: "John" })
db.users.find({ name: { $eq: "John" } })

Not Equal

db.users.find({ name: { $ne: "John" } })

Greater Than

db.users.find({ age: { $gt: 25 } })

Greater or Equal

db.users.find({ age: { $gte: 25 } })

Less Than

db.users.find({ age: { $lt: 30 } })

Less or Equal

db.users.find({ age: { $lte: 30 } })

In

db.users.find({ country: { $in: ["USA", "UK", "Canada"] } })

Not In

db.users.find({ country: { $nin: ["USA", "UK"] } })

Mini Practice

1. Use equal operator
2. Use range queries
3. Use $in operator
4. Combine operators

Up Next

Continue with Logical Operators — logical operators.