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// Using MongoDB Shell (mongosh) // CREATE - insertOne and insertMany db.users.insertOne({ name: "Alice", email: "alice@example.com", age: 28 }) db.users.insertMany([ { name: "Bob", email: "bob@example.com", age: 32 }, { name: "Carol", email: "carol@example.com", age: 25 } ]) // READ - find db.users.find() // all documents db.users.find({ age: { $gte: 28 } }) // age >= 28 db.users.findOne({ email: "alice@example.com" }) db.users.find({}, { name: 1, email: 1 }) // projection // UPDATE db.users.updateOne( { email: "alice@example.com" }, { $set: { age: 29, updatedAt: new Date() } } ) db.users.updateMany( { age: { $lt: 30 } }, { $inc: { age: 1 } } // increment age by 1 ) // DELETE db.users.deleteOne({ email: "bob@example.com" }) db.users.deleteMany({ age: { $lt: 20 } })
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