Write a Find Query in node.js
Sample Document:
{"_id" : ObjectId("602f2db6376b261d1d6addc2"),"id" : 1.0,"pupil" : "John","std" : 6.0,"ht" : 153.0,"wt" : 43.0}{"_id" : ObjectId("602f2db6376b261d1d6addc3"),"id" : 2.0,"pupil" : "Jack","std" : 6.0,"ht" : 164.0,"wt" : 54.0}{"_id" : ObjectId("602f2db6376b261d1d6addc4"),"id" : 3.0,"pupil" : "Jill","std" : 6.0,"ht" : 173.0,"wt" : 69.0}{"_id" : ObjectId("602f2db6376b261d1d6addc5"),"id" : 4.0,"pupil" : "william","std" : 6.0}
Approach
Query: Query to find a student with wt greater than 50.0 in node.js.
var MongoClient = require('mongodb').MongoClient;var url = "mongodb://localhost:27017/";MongoClient.connect(url, function(err, db) {if (err) throw err;var dbo = db.db("BecomeCodeExpert");var query = { "wt" : {"$gt":50.0 }};dbo.collection("students").find(query).toArray(function(err, result) {if (err) throw err;console.log(result);db.close();});});
Output:
[ { _id: 602f2db6376b261d1d6addc3,id: 2,pupil: 'Jack',std: 6,ht: 164,wt: 54 },{ _id: 602f2db6376b261d1d6addc4,id: 3,pupil: 'Jill',std: 6,ht: 173,wt: 69} ]
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