Ubuntu installation using MongoDB

installation

Official website Download: https://www.mongodb.org/

Unzip unpack rename to MongoDB move to/usr/local/directory

Create a soft connection

ln-s/usr/local/mongodb/bin/mongod/usr/bin/mongod for mobile server

ln-s/usr/local/mongodb/bin/mongo/usr/bin/mongo for starting the client (shell)

Create directory sudo mkdir-p/data/db is the default startup database path for MongoDB (--dbpath)

Start service $ sudo mongod

Start the client shell $ MONGO

Start HTTP Web UI $ sudo mongod--rest

Basic Concepts

SQL Terminology/Concepts	MongoDB Terminology/Concepts	Explanation/Description
Database	Database	Database
Table	Collection	Database Tables/Collections
Row	Document	Data record lines/documents
Column	Field	Data fields/Fields
Index	Index	Index
Table joins		Table connection, MongoDB not supported
Primary key	Primary key	Primary key, MongoDB automatically sets the _id field as the primary key

A more intuitive reflection of the correspondence between SQL and MongoDB

Basic syntax

 > DB #显示当前所在数据库, default is Test 
 
 > use database_name #切换数据库, if the name does not exist, it is equivalent to creating a new database (which is not saved until the collection is created) 
 
 > Show dbs/>show databases #查看所有的数据库 
 
 > db. collection_name insert ({' xx ': ' oo '}) #创建集合 inserted content formatted as key/value pairs 
 
 > db. collection_name Insert (document) #向集合中插入文档 as above 
 
 > db.  Collection_name.find () #查看已插入的文档 
  
 > db.col. ().  Pretty () #易读方式查询文档 
 
 >  db. Dropdatabase () #删除数据库          

Ubuntu installation using MongoDB