Mongodb Database Operations:

Operations like create database, Create Collection in database,                        , insert multiple data in collection.

 //create database:

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/mydb";

 MongoClient.connect(url, function(err, db) {
     if(err) throw err;
     console.log('Database is created successfully');

     db.close(); 

});

 

 //create collection

var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/mydb";

MongoClient.connect(url, function(err, db) {
     if(err) throw err;

    var dbo = db.db('mydb');

     dbo.createCollection("customers",function(err, res){
         if(err) throw err;
         console.log("collection is created..");
         db.close();
     });

});

 

//insert  multiple data into collection: 

var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/mydb";

MongoClient.connect(url, function(err, db) {
     if(err) throw err;

    var dbo = db.db('mydb');

var myobj = [
     {name:"x",roll:"1"},
     {name:"y",roll:"2",},
     {name:"z",roll:"3",},
     {name:"a",roll:"4",},
     {name:"r",roll:"5",},
     {name:"c",roll:"6",}
     ];
     dbo.collection('customers').insertMany(myobj, function(err, res){
         if(err) throw err;
         console.log("NUMBER OF DOCUMENT INSERTED: " + res.insertedCount);
         db.close();
     });

});

                 *****************To Be Continued*****************

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