Some operations of MongoDB

User table name

To select or create a database, if the database is empty, then MongoDB will continue to observe whether the database has actions written by the action, if any, create the database

Show DBS

Show databases equivalent to MySQL, used to observe the current database

DB. Select a document. inser ({name: "Zhangsan"})

Insert a piece of data (the document here is relative to the table in MySQL)

Db.collections

Check the currently selected library for the corresponding document (equivalent to the table in MySQL)

Some operations of MongoDB