MongoDB Exercises
Fill in the blanks to test your knowledge.
1
Find all documents in a collection
db.users.({})
2
Find documents where age is greater than 18
db.users.find({ age: { : 18 } })
3
Insert a single document
db.users.({ name: "Alice", age: 30 })
4
Update a document using $set
db.users.updateOne(
{ name: "Alice" },
{ : { age: 31 } }
)
5
Delete a single matching document
db.users.({ name: "Bob" })
6
Use aggregate to group documents
db.orders.([
{ $group: { _id: "$status" } }
])
7
Sort query results by name ascending
db.users.find().({ name: 1 })
8
Limit the number of returned documents
db.users.find().(5)