MONGODB Tutorial

🛠️ Creating a Database in MongoDB

In MongoDB, a database is created automatically when you insert data into a collection within it. There is no explicit create database command like in SQL.

🔹 Syntax to Create a Database

Use the use command to switch to a new or existing database:

use myDatabase
  

This command switches the current database context to myDatabase. If it doesn’t exist, MongoDB creates it when you insert the first document.

📥 Example: Create a Database with a Collection

use myCompanyDB

db.employees.insertOne({
  name: "Ravi Kumar",
  department: "Sales",
  age: 30
});
  

After inserting a document, the database myCompanyDB and the collection employees are both created.

🔍 View Existing Databases

show dbs
  

This command lists all databases that have at least one document stored.