Delete data from mongodb in nodejs

 

 

 

Post API insert data in MongoDB

This blog and in upcoming blog we will see mongodb basic and how is it work with installation and after installation we should not face any problem while making Database, collection(table) and using the data in nodejs even whenever we will make API. Read data from mongodb in nodejs

• # Read Data from MongoDB
  
• # Make file for db connection
  
• # Handle Promise 

 

Now in this blog we will consider about mongoDB basic command which we can use to create Database, collection etc.

 

 What is MongoDB

 

MongoDB is a popular open-source NoSQL (non-relational) database management system. NoSQL means no structure like it is look like an object while in SQL it is a structure query language like SELECT CustomerName, City FROM Customers; (The SELECT statement is used to select data from a database.) But NoSQL database is useless...NOT completely because of whenever we want add extra column in database then it is possible through NoSQL MongoDB.   

 

MongoDB installation - CLICK HERE

MongoDB Basic Command - CLICK HERE

About MongoDB vs SQL - CLICK HERE

CRUD in MongoDB - CLICK HERE

 

 

Object Like - 

 

 

{
  "_id": {
    "$oid": "659ad46e0382148123c82841"
  },
  "name": "moto G60",
  "brand": "motorola",
  "price": 16500,
  "category": "mobile"
}

 

 

MongoDB is a type of database that helps store and manage large amounts of data in a flexible and scalable way. Unlike SQL, MongoDB doesn't require a fixed structure for the data, allowing you to store information in a more versatile format.

• MongoDB is a NoSQL database.
• The data stored in a collection
• Collection don't have row and columns
• Data is stored in the form of object.

 Read Data from MongoDB

 

if you remember, we wrote the code for database connection and data reading in the same file. if you write coding of insert, update, delete in same function and same file then it will be very complex. so that's why we will separate file of mongoDB connection file.

 

Now we will create the deleteData() function with condition of delete the data.

 

 

const dbConnect = require('./mongodb/mongodb')

const deleteData = async () => {
    // console.log("deleteData function is called")
    let data = await dbConnect();
    let result = await data.deleteOne({
         name: 'moto G60'
    })
    console.log(result)
}

deleteData();

 

 

 

 

 with this condition if result.acknowledged is true then print console data.

const dbConnect = require('./mongodb/mongodb')

const deleteData = async () => {
    // console.log("deleteData function is called")
    let data = await dbConnect();
    let result = await data.deleteOne({
         name: 'moto G60'
    })
    console.log(result)
    if(result.acknowledged)
    {
        console.log("records deleted") 
    }
}

deleteData();

 

 

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