Table of Contents

1. Create a Database

MongoDB does not have a create database command. Use the use command with the name you want. This only switches to that database. The database is actually created when you insert the first document into it.

[mongop@recovery ~]$ /app/mongodb/7.0.43/bin/mongosh -u admin -p --authenticationDatabase admin
Enter password: ******
Current Mongosh Log ID: 6ae9d0ff1a508192743c2563
Connecting to:          mongodb://@127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&authSource=admin&appName=mongosh+2.12.0
Using MongoDB:          7.0.43
Using Mongosh:          2.12.0
mongosh 2.14.1 is available for download: https://www.mongodb.com/try/download/shell

For mongosh info see: https://www.mongodb.com/docs/mongodb-shell/

Enterprise test> show dbs
admin   132.00 KiB
config   72.00 KiB
local    72.00 KiB
Enterprise test>


# Create database 
Enterprise test> use myFirstDB
switched to db myFirstDB
Enterprise myFirstDB>

Enterprise myFirstDB> show dbs
admin   132.00 KiB
config   72.00 KiB
local    72.00 KiB
Enterprise myFirstDB> db.students.insertOne({ name: "Ravi" })
{
  acknowledged: true,
  insertedId: ObjectId('6ae9d1641a508192743c2564')
}
Enterprise myFirstDB>

Enterprise myFirstDB> show dbs
admin      132.00 KiB
config      72.00 KiB
local       72.00 KiB
myFirstDB    8.00 KiB
Enterprise myFirstDB>

2. List All Databases

Only databases that contain data are listed. An empty database created with use alone will not appear.

Enterprise myFirstDB> show dbs
admin 132.00 KiB
config 72.00 KiB
local 72.00 KiB
myFirstDB 8.00 KiB
Enterprise myFirstDB>
// or
Enterprise myFirstDB> show databases
admin 132.00 KiB
config 72.00 KiB
local 72.00 KiB
myFirstDB 40.00 KiB
Enterprise myFirstDB>

3. Switch Between Databases

Use the same use command with the name of any database. To check which database you are currently in, run db.

Enterprise myFirstDB> use admin
switched to db admin
Enterprise admin>
// Check the current database
Enterprise admin> db
admin
Enterprise admin>

4. Delete a Database

First switch to the database you want to delete, then drop it. This deletes the current database and all its data, so confirm with db before running it.

Enterprise admin> use myFirstDB
switched to db myFirstDB
Enterprise myFirstDB>
// Confirm the current database

Enterprise myFirstDB> db
myFirstDB
Enterprise myFirstDB>

Enterprise myFirstDB> db.dropDatabase()
{ ok: 1, dropped: 'myFirstDB' }
Enterprise myFirstDB>

Enterprise myFirstDB> show dbs
admin   132.00 KiB
config   96.00 KiB
local    72.00 KiB
Enterprise myFirstDB>