//2a.  List all restaurants' name that the restaurants are cuisine of Italian, 
//locate in zip 10036 and grade is A, sort data by name in ascending order
db.restaurant.find({},{"name":1,"cuisine":"Italian","address.zipcode" :"10036","_id":0, "grade":"A"}).pretty()

//2b. How many American Cuisine in Borough of Brooklyn?
// Answer : 1273
db.restaurant.count({"cuisine":"American", "borough":"Brooklyn"})

//2c. ) Create a restaurant:
 //address
 //building: baker center
 //street: 2000 clayton state
 //zipcode: 30260
 //borough: morrow
 //cuisine: mongodb
 //name: A Cup of Mongo 
 db.restaurant.insert({"address":1, 
                   "address.building":"baker center", 
					  "address.street":"2000 clayton state", 
					  "address.zipcode":"30260", 
					  "borough":"morrow", 
					  "cuisine":"mongodb", 
					  "name":"A Cup of Mongo"})
//2d. modify the restaurant name from "Beija-Flor" to "King of Beija"
 //name :"Beija-Flor"
 //restaurant_id :"50005087" 
 db.restaurant.update(
	{restaurant_id :"50005087" },
	{$set:{"name":"King of Beija"}}
 )
 
//2e.Delete the restaurant named "Buffet 58" with restaurant_id "50009900" 
db.restaurant.remove(
	{restaurant_id :"50009900" }
)

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About MongoDB

MongoDB is a cross platform document oriented NoSQL database.

Key Features:

  • Designed to overcome the the limitations of relational databases approach and other NoSQL solutions
  • Horizontal scaling
  • Load balancing capabilities
  • Better data availability and stability

Syntax help

Commands

Inserting documents

  1. db.collection.insert(): Using insert you can either insert one document or array of documents
db.employees.insert(   {empId: 3, name: 'Ava', dept: 'Sales' });
  1. db.collection.insertOne(): Inserts one document
db.employees.insertOne(  {empId: 4, name: 'Nick', dept: 'Accounting' });
  1. db.collection.insertMany: Inserts multiple documents
db.employees.insertMany([
  {empId: 1, name: 'Clark', dept: 'Sales' },
  {empId: 2, name: 'Dave', dept: 'Accounting' }
]);

Updating documents

  1. db.collection.update() : Updates one or more than one document(s) in collection based on matching document and based on multi option
db.employees.update(   
  {empId: 3 },
  { $set: { region: "Asia" } }
);
  1. db.collection.updateOne() : Updates a single document in collection based on matching document
db.employees.updateOne(   
  {empId: 2 },
  { $set: { region: "Asia" } }
);
  1. db.collection.updateMany() : Updates multiple documents in collection based on the condition.
db.employees.updateMany(   
  { dept: 'Sales'},
  { $set: { region: "US" } }
);

Deleting documents

  1. db.collection.deleteOne(<filter>, <options>): Deletes a Single document from collection
db.employees.deleteOne({ empId: 1})
  1. db.collection.deleteMany(<filter>, <options>): Deletes all documents with matching filter
db.employees.deleteMany({ dept: 'Sales'})