MongoDb Tutorial

Day 12 : Drop database in MongoDB





Mongodb tutorial series

  1. Create database in mongodb
    2.
  2. Create collection in mongodb
    3.
  3. Create document in mongodb
    4.
  4. query document in mongodb
    5.
  5. update document in mongodb
    6.
  6. Projections in mongodb
    7.
  7. Sort records in mongodb
    8.
  8. Delete document in mongodb
    9.
  9. drop collection in mongodb
    10.
  10. drop database in mongodb
    11.


Overview

In this part of the Learn Mongo Series, we will learn how to drop a database in mongodb. We will drop the students database.

Let's drop

We can drop a database using the db.dropDatabase() command. Synax is we can select the DB to be dropped using the use <database_name> command. Now we can drop the database using the db.dropDatabase() command. Let's drop the students database.

  • Step 1 - List the DBs: firstly list all the non empty DBs using the show dbs command as shown below : 

    										
> show dbs
activityoverload        0.203125GB
animals 0.203125GB
clonecs 0.203125GB
local   0.078125GB
test    0.203125GB
students 				0.078125GB  
>

  • Step 2 - Drop the DB: Let's drop the students db. We can drop the database using the following commands : 

    										
>use students
switched to db students
>db.dropDatabase()
{ "dropped" : "students", "ok" : 1 }
>

  • Step 3 - List databases again : List all the DBs again to check the successful deletion of students DB as shown below : 

    										
> show dbs
activityoverload        0.203125GB
animals 0.203125GB
clonecs 0.203125GB
local   0.078125GB
test    0.203125GB
>

    • Hurray !! Mission Accomplished. We have successfully deleted the mongodb database.

Summary

In this part of learn mongo series , we learned about how we can drop a database in mongodb. We learned the following commands of mongodb :

  1. use : This command is use to either create a new database or switch to an already existing database.
  2. show dbs : This command is used to list all the non-empty mongodb databases on the console.
  3. db.dropDatabase() : This command is used to drop the current database.