What does $and do?

MongoDBJunior~1 min read

$and is a logical operator that selects documents satisfying every condition at once.

Example:

db.users.find({
  $and: [
    { age: { $gt: 18 } },
    { isActive: true }
  ]
})

This query returns only documents where age is greater than 18 and isActive is true.

The gist of it: $and is a logical "AND" across several conditions.

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