MongoDB Learning Note 01--Overview, installation, running

MongoDB Overview

MongoDB is a document-type NoSQL database that stores bson–> JSON binaries. The internal execution engine is the JS interpreter, which stores the document as a Bson structure and translates it into a JS object when queried. And can be manipulated by JS syntax.

MongoDB vs. traditional database

A traditional database is a structured database with the same number of columns

Document database in document units
Like what:

{    id:1,    name: "billvsme",    age:21,}

{    id:2,    name: "zhangshan",    phone:12313,    address:23424,}

Can exist under a table

The most important feature of a document database is "no structure", and each document under the table can have its own unique properties and values

Columns such as: Comment reply, scoring, at least a number of tables in the traditional database, association complex, and in the document database in a document can be completed

{    title:‘xxxx‘    comment:[        {            connent:‘你写的不错哦！！！‘，            reply:[‘评论不错‘，‘写的不错‘]        },        {            connent:‘写的不怎么样~~‘，            reply:[‘赞同‘，‘非常赞同‘]        }    ]}

MongoDB Installation

Download directly, unzip to run
Https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.0.4.tgz

MongoDB Run MONGODB file structure

• Bsondump binary Export
• MONGO client (equivalent to MySQL)
• Mongod Service side (equivalent to mysqld)
• Mongodump Overall Database Export
• Mongoexport export easy to identify JSON documents or CSV documents
• Mongorestore Importing databases
• MONGOs Router (for shard time)

Start Mongod

mongod --dbpath /path/to/database --logpath  /path/to/logfile --fork  --port 27017

• –dbpath Database Storage Path
• –logpath log file path
• –port Port Default 27017
• –fork Background Run

Test

Direct input./mongo to enter MONGO

• Show DBS View Database
• Use database to enter databases
• Show Tables/collections View Table
• Db.help () Help

MongoDB Learning Note 01--Overview, installation, running