Created
July 15, 2017 02:14
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Mongo basic drills
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Find all restaurants | |
db.restaurants.find({}); | |
Find the command that makes the first 10 restaurants appear when db.restaurants is alphabetically sorted by the name property. | |
db.restaurants.find({}).sort({name: 1}).limit(10) | |
Retrieve a single restaurant by _id from the restaurants collection. This means you'll first need to get the _id for one of the restaurants imported into the databa | |
db.restaurants.findOne({_id: db.restaurants.findOne({})._id}); | |
Write a command that gets all restaurants from the borough of "Queens". | |
db.restaurants.find({borough: "Queens"}) | |
Write a command that gives the number of documents in db.restaurants. | |
db.restaurants.count() | |
Write a command that gives the number of restaurants whose zip code value is '11206'. Note that this property is at document.address.zipcode | |
db.restaurants.find({"address.zipcode": '11206'}).count() | |
Write a command that deletes a document from db.restaurants. This means you'll first need to get the _id for one of the restaurants imported into the database. | |
var objectId = db.restaurants.findOne({})._id; | |
db.restaurants.deleteOne({_id: objectId}); | |
Write a command that sets the name property of a document with a specific _id to 'Bizz Bar Bang'. Make sure that you're not replacing the existing document, but instead updating only the name property. | |
db.restaurants.updateOne({_id: objectId}, {$set:{name: 'MIKE'}}); | |
db.restaurants.update({'address.zipcode': '10035'}, {$set: {'address.zipcode': '10036'}}, {multi: true}); |
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