Create and delete mongodb Databases

To create a database in MongoDB, run the "use" command: usemydb; To create a database. This step is very important. If you leave the database without any operations, the database will be deleted by the system. Verify ------------------------------- and then use the insert statement db. user. insert ({name: zhouzhigang }).

To create a database in MongoDB, run the use command: use mydb; To create a database. This step is very important. If you leave the database without any operations, the database will be deleted by the system. Verify ------------------------------- and then use the insert statement db. user. insert ({name: 'zhouzhigang '}).

You can use the use command to create a MongoDB database:

As follows:

Use mydb;

In this way, a database is created.

This step is very important. If you leave the database without any operations, the database will be deleted by the system.

Verify -------------------------------

Then use the insert statement:

Db. user. insert ({name: 'zhouzhigang '});

Run the following command to view

Show collections; --- view 'table'

Show dbs --- view database

Operation:

Mongodb deletes a database

Use mydb;

Db. dropDatabase ();