MongoDB Configuration and basic operations

Mongodb
3.0 new Features
Wiredtiger
MMAPv1
Pluggable Engine API
Web-based visual management tools

View version number
Mongod--version
Start the database

Mongod--dbpath $dbpath--logpath $logpath--logappend--fork--port= 27000

$dbpath Data Catalog
$logpath is the path to the log file is not a directory path
Logappend Log Append method
--fork Background Run

Under the win
Add to System service

Mongod--dbpath $dbpath--logpath $logpath--logappend--install"MongoDb"

You can start with the service again
NET Start/stop MongoDB

Mongod--dbpath./data--logpath./log/mongo.log--logappend--fork

Operation

Start

Mongod--dbpath/usr/local/mongodb/data--logpath/usr/local/mongodb/log/mon.log--logappend--fork--port=27000 

Default Port 27017
Connection
MONGO remote host IP or DNS:MONGODB port number/database name-u user-p password
MONGO 127.0.0.1:27000
MONGO--port=27017
Querying all databases
Show databases
Shut down
On a client that is already connected
Use admin
Db.shutdownserver ()

Start with a configuration file

Establish mongodb.conf

#设置数据目录dbpath=/usr/local/mongodb/data# Setting the log file location LogPath=/usr/local/mongodb/log/mon.log# Open log output operation Logappend=true#不使用用户管理验证noauth=truePort=27017

Specify a configuration file to start
Mongod-f/usr/local/mongodb/mongodb.conf

-----------------------------------

Basic operations

1. Using the HK Database
> Use HK
Switched to DB HK
> Show Databases
Admin 0.000GB
Local 0.000GB
Use does not create a database when there is no actual data operation

2. Create a Collection

db.createcollection ("Stu")

> db.createcollection ("stu""OK"1  }> show databasesadmin  0. 000GBhk     0. 000GBlocal   0. 000GB

The HK database is then actually created

View all the data in the collection
Db.stu.find ()

3. Inserting data
Db.stu.insert ({"Name": ' HK ', ' age ': ten, ' Class ': 20});

> Db.stu.Find()> Db.stu.insert ({"name":'HK',' Age':Ten,'class': -}); Writeresult ({"ninserted":1 })> Db.stu.Find(){ "_id": ObjectId ("59295c842e2070afc7e34f3e"),"name":"HK"," Age":Ten,"class": -}

View Collections
> Show Collections
Stu

4. View HK Table Data
Db. Collection name. Find ({several conditions})
Inserting data from different structures

var data={   "name": "Zhang San",   "   Sex": "Male", "hobby": "Football",   " 中文版:;d b.stu.insert (data); >"_id": ObjectId ("59295c842e2070afc7e34f3e"), "name": "HK", "age": Ten, "Class":"_id": OBJ Ectid ("59295e3e2e2070afc7e34f3f"), "name": "Zhang San", "Sex": "Male", "hobby": "Soccer", "中文版": 89}

MongoDB each record generates _ID
Composition = timestamp + machine code +pid+ counter

5. View individual Document Information

> Db.stu.findOne () {    "_id": ObjectId ("59295c842e2070afc7e34f3e"),    "name": "HK",     "Age": Ten,    "class":

6. Delete data

Db.stu.remove ({"_id": ObjectId ("59295c842e2070afc7e34f3e")}); > Db.stu.remove ({"_id": ObjectId ("59295c842e2070afc7e34f3e""nremoved": 1 })>  "_id": ObjectId ("59295e3e2e2070afc7e34f3f"), "name": "Zhang San", "Sex": "Male", "hobby": "Soccer", "中文版": 89}

7. Updating data

var data={   "name": "Zhang San",   "sex": "female",   "hobby": "Dancing",   " 中文版 ":_id": ObjectId ("59295e3e2e2070afc7e34f3f")},data);

Operation Example

> var data={...    "name":"Zhang San",...    "Sex":"female",...    "Hobby":"Dancing",...    "中文版": About... };> Db.stu.update ({"_id": ObjectId ("59295e3e2e2070afc7e34f3f")},data); Writeresult ({"nmatched":1,"nupserted":0,"nmodified":1 })> Db.stu.Find(){ "_id": ObjectId ("59295e3e2e2070afc7e34f3f"),"name":"Zhang San","Sex":"female","Hobby":"Dancing","中文版": Aboutdocument update with completely different structure> var data={...      "a":'Ajax'... }> Db.stu.update ({"_id": ObjectId ("59295e3e2e2070afc7e34f3f")},data); Writeresult ({"nmatched":1,"nupserted":0,"nmodified":1 })> Db.stu.Find(){ "_id": ObjectId ("59295e3e2e2070afc7e34f3f"),"a":"Ajax"}

View Code

8. Deleting a collection

Db.stu.drop ()
> Db.stu.drop ()
True
> Show Collections

9. Delete the database (delete the current database, switch and re-operate)

Db.dropdatabase ()

MongoDB Configuration and basic operations