Create a database MongoDB

grammar

MongoDB database creation syntax is as follows:

use DATABASE_NAME

If the database does not exist, create a database, or switch to the specified database.

Examples

The following example we create a database w3big:

> use w3big
switched to db w3big
> db
w3big
> 

If you want to see all databases, you can use the command show dbs:

> show dbs
local  0.078GB
test   0.078GB
> 

You can see that we just created database w3big not in the list of databases, to show it, we need to insert some data w3big database.

> db.w3big.insert({"name":"本教程"})
WriteResult({ "nInserted" : 1 })
> show dbs
local   0.078GB
w3big  0.078GB
test    0.078GB
> 

MongoDB in the default database to test, if you do not create a new database, the collection will be stored in the test database.