MongoDB installation start adding additions and deletions to the document

Add the bin path to the environment variable after the MongoDB decompression

Create A.bat and B.bat files:

A.bat content:

Mongod--dbpath F:\MongoData

B.bat content:

MONGO 127.0.0.1:27017/admin

A.bat is the boot MongoDB server,--dbpath is used to specify the storage path of the data

B.bat is the start of the MONGO shell (ie: JS engine), theadmin is used to specify which database

Start A.bat and see

2014-10-14t22:35:48.734+0800 [Initandlisten] waiting for connections on port 270
17

The instructions are OK.

Don't shut the window, that's MONGO's server.

Re-start B.bat:

MongoDB Shell version:2.6.5
Connecting To:127.0.0.1:27017/admin

See this note, MONGO Shell has been started, themiddle of the 2.6.5 6 is even, the representative is a stable release version, odd for the development version

A little bit of simple small command:

To create a database:

> Use Foobar
Switched to DB Foobar

Do nothing at this time or close the window, the database immediately disappears

> Db.persons.insert ({name: "Uspcat"})
Writeresult ({"ninserted": 1})

Insert a record, the persons document will exist in the Foobar database

Commands that show which databases are available:

> Show DBS
Admin (empty)
Foobar 0.078GB
Local 0.078GB

Which collection commands are displayed:

> Show Collections
Persons
System.indexes

To find commands for persons document records:

> Db.persons.find ()
{"_id": ObjectId ("543d357df0b430df52a3ef24"), "name": "Uspcat"}

You can also use FindOne () to find the first record:

> Db.persons.findOne ()
{"_id": ObjectId ("543d357df0b430df52a3ef24"), "name": "Uspcat"}

Insert Record:

> Db.persons.insert ({name: "extjs4.0"})
Writeresult ({"ninserted": 1})
> Db.persons.find ()
{"_id": ObjectId ("543d357df0b430df52a3ef24"), "name": "Uspcat"}
{"_id": ObjectId ("543d370df0b430df52a3ef25"), "name": "extjs4.0"}

Update operation:

> var p = db.persons.findOne ()
> P
{"_id": ObjectId ("543d357df0b430df52a3ef24"), "name": "Uspcat"}
> db.persons.update (p,{name: "Uspcat2"})
Writeresult ({"nmatched": 1, "nupserted": 0, "nmodified": 1})
> var p = db.persons.findOne ()
> P
{"_id": ObjectId ("543d357df0b430df52a3ef24"), "name": "Uspcat2"}

The reason you can declare Var is because the MONGO shell is a JS engine.

The update operation is best done with the Finder and the modifier:

> db.persons.update ({name: "extjs4.1"},{$set: {age:1,name: "Tom2"}});

This changes the name of the second record to Tom2 and adds the Age:1 Bson

Delete operation:

> Db.persons.remove ({name: "Tom2"})
Writeresult ({"nremoved": 1})

CTRL + C exit MONGO Shell engine

CTRL + C exits Mongod server, y command terminates batch processing

MongoDB installation start adding additions and deletions to the document