3.10. MongoDB deletes the database

3.10.1. Grammar ¶

The syntax format for MongoDB to delete a database is as follows:

db.dropDatabase()

Delete the current database. The default is test. You can use the db Command to view the current database name.

3.10.2. Example ¶

For the following example, we deleted the database runoob.

First, look at all the databases:

> show dbs
admin   0.000GB
config  0.000GB
local   0.000GB
runoob  0.000GB

Next, we switch to the database runoob:

> use runoob
switched to db runoob
>

Execute the delete command:

> db.dropDatabase()
{ "dropped" : "runoob", "ok" : 1 }

Finally, we use show dbs to command whether the database has been deleted successfully:

> show dbs
admin   0.000GB
config  0.000GB
local   0.000GB

3.10.3. Delete a collection ¶

The collection deletion syntax is in the following format:

db.collection.drop()

The following example deletes the collection site in the runoob database:

> use runoob
switched to db runoob
> db.createCollection("runoob")     # 先创建集合，类似数据库中的表
> show tables             # show collections 命令会更加准确点
runoob
> db.runoob.drop()
true
> show tables
>