playground-1.mongodb.js

/* global use, db */
// MongoDB Playground
// To disable this template go to Settings | MongoDB | Use Default Template For Playground.
// Make sure you are connected to enable completions and to be able to run a playground.
// Use Ctrl+Space inside a snippet or a string literal to trigger completions.
// The result of the last command run in a playground is shown on the results panel.
// By default the first 20 documents will be returned with a cursor.
// Use 'console.log()' to print to the debug output.
// For more documentation on playgrounds please refer to
// https://www.mongodb.com/docs/mongodb-vscode/playgrounds/

// Select the database to use.
use("Mobile-App-Final");

// Insert a few documents into the sales collection.
db.getCollection("sales").insertMany([
  {
    item: "abc",
    price: 10,
    quantity: 2,
    date: new Date("2014-03-01T08:00:00Z"),
  },
  {
    item: "jkl",
    price: 20,
    quantity: 1,
    date: new Date("2014-03-01T09:00:00Z"),
  },
]);

// Run a find command to view items sold on April 4th, 2014.
const salesOnApril4th = db
  .getCollection("sales")
  .find({
    date: { $gte: new Date("2014-04-04"), $lt: new Date("2014-04-05") },
  })
  .count();

// Print a message to the output window.
console.log(`${salesOnApril4th} sales occurred in 2014.`);

// Here we run an aggregation and open a cursor to the results.
// Use '.toArray()' to exhaust the cursor to return the whole result set.
// You can use '.hasNext()/.next()' to iterate through the cursor page by page.
db.getCollection("sales").aggregate([
  // Find all of the sales that occurred in 2014.
  {
    $match: {
      date: { $gte: new Date("2014-01-01"), $lt: new Date("2015-01-01") },
    },
  },
  // Group the total sales for each product.
  {
    $group: {
      _id: "$item",
      totalSaleAmount: { $sum: { $multiply: ["$price", "$quantity"] } },
    },
  },
]);