[MongoDB] Introduce to MongoDB

1. Use or create a database:

Use Wandrecorder

You'll use the keyword to create or fetch a exicting database.

2. Find all documents in the database.

Db.wands.find ()

You already start with DB Keywrod. Then follow your collection name, where is ' wands ', find () method would return all the documents in that collection.

3. Insert document to the collections:

Db.wands.insert ({name: ' Dream Bender ', Creator: ' Foxmond '})

Use Insert () Metod to inserts JSON data to the collection as a document.

4. Find a value in the collections:

Db.wands.find ({name: ' Storm Seeker '})

You can pass the JSON object or Bson an object into the Find method.

http://bsonspec.org/

Result:

{  "_id": ObjectId (' d0a77e57a0544ec7ad5a740b '),  "name": "Storm Seeker",  " Creator ":" Olivemist ",  " level_required ": $,  " price ": 55.99,  " powers " : [    "Wind",    "Static"  ],  "damage": {    "magic" : 2,    "melee": 5  }}

5. The data type not necessary to is array, number or string, they canbe Object, Date also:

Db.wands.insert ({  "name": "Dream Bender",  "creator": "Foxmond",  "Level_ Required ":  ", "Price": 34.9,  "powers": [' Fire ', ' Love '],  ' damage ': {' Magic ": 4," melee ": 2}});

6. Find value in a array:

Db.wands.find ({powers: ' Fire '})

[MongoDB] Introduce to MongoDB