24. Toad Notes Go language--mongdb database use

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24. Toad Notes Go language--mongdb database use

MONGDB Database

A Distributed File storage database, an open source project written by the C + + language.

In a NoSQL, the most feature-rich, relational database-like product.

The data structure it supports is very loose and is a JSON-like Bson format, so you can store more complex data models.

Its supported query language is very powerful, its syntax is somewhat similar to object-oriented query language, but also supports the functions of index, MapReduce and so on.

Download installation

Download Address: https://www.mongodb.com/download-center#community

File name:

Mongodb-win32-x86_64-2008plus-ssl-3.2.7-signed.msi

Double-click to install.

After the installation is complete, the path

C:\Program Files\mongodb\server\3.2\bin

All binary files exist.

Add the path to the environment variable path.

Start the database

Run cmd as Administrator.

Then execute:

Mongod--dbpath D:\mongodb\data--logpath=d:\mongodb\logs\mongodb.log--install

Then start MongoDB

Perform:

net start MongoDB

Basic operations

Link Database

Execute MONGO directly.

Enter help to see the basic Operations Command:

Show DBS: Display Database list

Show Collections: Displays a collection in the current database (similar to a table in a relational database)

Show Users: Show user

Switch/CREATE Database

Use Yourdb; The current database is created automatically when a collection (table) is created

Delete the currently used database

Db.dropdatabase ();

Repairing the current database

Db.repairdatabase ();

View the database currently in use

Db.getname ();

db The DB and GetName methods are the same effect and can query the currently used database

Show Current DB status

Db.stats ();

Current DB version

Db.version ();

Create a data table

Db.createcollection ("account")

Add user

Old version:

Db.adduser ({User: "Test1",

PWD: "Admin",

roles: ["ReadWrite", "DbAdmin"]

} )

New version:

Db.createuser (

{

User: "Astaxie",

PWD: "Astaxie",

Roles

[

{role: "ReadWrite", DB: "Test"},

]

}

)

Close the database

net stop MongoDB