Mongodb Basics Set 1: Insert Operation

In this series, I would be sharing a few basic MongoDB articles on different operations.

1)Insert a single record in MongoDB collection.

var param={

firstname:"joey",

middlename:"",

lastname:"tribani",

phone:9898989898

}

db.collection('exampleset').insertOne(param)



This returns something like this:

{

   "acknowledged" : true,

   "insertedId" : ObjectId("56fc40f9d735c28df206d078")

}



You can also use 'insert' commond for inserting single record.

db.collection('exampleset').insert(param);

This returns :

WriteResult({ "nInserted" : 1 });





2)Insert multiple records in MongoDB collection.



var records=[{

firstname:"joey",

middlename:"",

lastname:"tribani",

phone:9898989898

},{firstname:"koey",

middlename:"",

lastname:"desuoiza",

phone:9898989898

}]



db.collection('exampleset').insertMany(records);

This returns :

{

   "acknowledged" : true,

   "insertedIds" : [

      ObjectId("562a94d381cb9f1cd6eb0e1a"),

      ObjectId("562a94d381cb9f1cd6eb0e1b"),

    

   ]

}



OR



db.collection('exampleset').insert(records)

This returns:

BulkWriteResult({

        "writeErrors" : [ ],

        "writeConcernErrors" : [ ],

        "nInserted" : 2,

        "nUpserted" : 0,

        "nMatched" : 0,

        "nModified" : 0,

        "nRemoved" : 0,

        "upserted" : [ ]

})

Notes:

1)By default it will insert all documents in order(This is applicable to both insertMany and insert command).

If you want to change behaviour please use this commond,

db.collection('exampleset').insertMany(records,{ ordered: false });

db.collection('exampleset').insert(records,{ ordered: false });

If ordered is set to true and any document reports an error then the

remaining documents are not inserted.

If ordered is set to false then remaining documents are inserted even if an error occurs.

2)All three of these(insert,insertMany,insertOne) also allow you to define a custom writeConcern and

also, create a collection if it doesn't exist.

3)The maximum BSON(Mongodb stores each record in BSON format) document size is 16 megabytes and

maximum bulk size write is 100,000(i.e insertMany or insert allows a maximum of 1lac documents in array).

You Might Like:

Node.js interview questions set 1

Node JS: Understanding bin in package.json.

Node.js: Bundling your Node.js application to a single executable for Windows.

Node.js: Extract text from image using Tesseract.

Comments

Coding Interview Questions Set 1

From this article, I will be sharing with you all a series of articles on coding interview questions. So please stay connected for the latest set of questions. It will be a good brainstorming exercise and will also prepare you for coding interviews and will definitely boost your confidence. So let's start, 1)Reverse of a string with only O(1) extra memory. Solution: var reverse = function(string) { let result = '' for(let i= string.length -1; i >= 0; i--){ result += string[i]; } return result; }; 2)Fizz Buzz: Write a program that will accept a number n and will output number till n but for multiples of three it should output “Fizz” instead of the number and for the multiples of five output “Buzz”. For numbers which are multiples of both three and five output “FizzBuzz”. Solution: var fizzBuzz= function(n) { const arr=[] for(i=1; i<=n; i++){ ...

JavaScript: Debouncing | Flipkart UI Interview Question.

To understand this programming practice will go with a quick example. We all do online shopping and we do search for products on Flipkart on the search bar. So when we type on search bar i.e on every keypress we are actually giving API requests to the server, which in response gives us suggestions. Actually, it's a time-consuming task and may degrade the performance of the webpage. So to improve the performance we use debounce function which actually acts as a controller which reduces the API request to the server on keypress event. In simple terms, we are giving API request only after a certain amount of time between two keypress events. A debounce is a higher-order function. Higher-order function: A function that returns another function. Let's dive deep: HTML Code: <input type="text" onkeyup="searchProducts()"/> Consider this as a search bar for Flipkart. On any keypress, we are calling searchProducts() function. Javascri...

Node.js: Bundling your Node.js application to single executable for Windows.

In this article, we will see how to bundle Node.js application to a single executable for Windows. What's the need? Well recently, I had taken a work where I needed to convert pdf's(Of similar format) to excel sheet. So I was reading the pdf's from a folder in desktop and I was storing the output excel sheet into a separate folder on the desktop. I used Node.js for the program. Now the client wanted it to install the program on 25 windows machine and his budget was really low. So it was also not possible for me to install node.js for 25 machines and then install the required dependency for each one. One of the solution: While I was searching for an easy solution I found this amazing npm module pkg . This module can make your node.js app work like plug and play type. No need to install Node.js on the client machine or any other dependency. It helps to make a commercial or trial version of your node.js application without exposing the source code. I found ...

Explore Learn and Grow

Search This Blog