Finding and Querying
Find all and one
find returns a cursor; findOne returns a single document or null.
db.books.find()
db.books.findOne({ title: "Practical MongoDB" })Filter with operators
Comparison operators live inside the query document.
db.books.find({ year: { $gte: 2024 } })
db.books.find({ tags: "nosql" })Combine conditions
Multiple fields imply AND. Use $or for alternatives.
db.books.find({
$or: [
{ year: 2025 },
{ tags: "database" }
]
})Pretty print results
In mongosh, chaining .pretty() is often unnecessary; the shell formats documents for you. Limit results while exploring.
db.books.find().limit(5)
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