A NoSQL (often interpreted as Not Only SQL) database provides a mechanism for storage and retrieval of data that is modeled in means other than the tabular relations used in relational databases.

en.wikipedia.org/wiki/NoSQL

NoSQL

Which basically means

• A database is a database.
• Groups of records (tables) are actually called collections.
• Each collection comprises documents, same as tables contain records.

Show me the money...

// get all collections in a database

db.getCollectionNames();

$ unicorns

console says...

draw your own conclusions...

db.COLLECTION_NAME.COMMAND()

how many _____?

//db.COLLECTION_NAME.COMMAND()
db.unicorns.count();

$ 12 documents in unicorns

what do we have here?

db.unicorns.find().pretty();

{
        "_id" : ObjectId("545b120902e441c9bade77b4"),
        "name" : "Horny",
        "dob" : "1992-03-14T07:47:00Z",
        "gender" : "m",
        "loves" : [
                "carrot",
                "papaya"
        ],
        "weight" : 600,
        "vampires" : 63
}
{
        "_id" : ObjectId("545b120902e441c9bade77b5"),
        "name" : "Aurora",
        "dob" : "1991-01-25T13:14:00Z",
        "gender" : "f",
        "loves" : [
                "carrot",
                "grape"
        ],
        "weight" : 450,
        "vampires" : 43
}
{
        "_id" : ObjectId("545b120902e441c9bade77b6"),
        "name" : "Unicrom",
        "dob" : "1973-02-10T22:10:00Z",
        "gender" : "m",
        "loves" : [
                "energon",
                "redbull"
        ],
        "weight" : 984,
        "vampires" : 182
}
{
        "_id" : ObjectId("545b120902e441c9bade77b7"),
        "name" : "Roooooodles",
        "dob" : "1979-08-18T18:44:00Z",
        "gender" : "m",
        "loves" : [
                "apple"
        ],
        "weight" : 575,
        "vampires" : 99
}
{
        "_id" : ObjectId("545b120902e441c9bade77b8"),
        "name" : "Solnara",
        "dob" : "1985-07-05T02:01:00Z",
        "gender" : "f",
        "loves" : [
                "apple",
                "carrot",
                "chocolate"
        ],
        "weight" : 550,
        "vampires" : 80
}
{
        "_id" : ObjectId("545b120902e441c9bade77b9"),
        "name" : "Ayna",
        "dob" : "1998-03-08T08:30:00Z",
        "gender" : "f",
        "loves" : [
                "strawberry",
                "lemon"
        ],
        "weight" : 733,
        "vampires" : 40
}
{
        "_id" : ObjectId("545b120902e441c9bade77ba"),
        "name" : "Kenny",
        "dob" : "1997-07-02T10:42:00Z",
        "gender" : "m",
        "loves" : [
                "grape",
                "lemon"
        ],
        "weight" : 690,
        "vampires" : 39
}
{
        "_id" : ObjectId("545b120902e441c9bade77bb"),
        "name" : "Raleigh",
        "dob" : "2005-05-04T00:57:00Z",
        "gender" : "m",
        "loves" : [
                "apple",
                "sugar"
        ],
        "weight" : 421,
        "vampires" : 2
}
{
        "_id" : ObjectId("545b120902e441c9bade77bc"),
        "name" : "Leia",
        "dob" : "2001-10-09T14:53:00Z",
        "gender" : "f",
        "loves" : [
                "apple",
                "watermelon"
        ],
        "weight" : 601,
        "vampires" : 33
}
{
        "_id" : ObjectId("545b120902e441c9bade77bd"),
        "name" : "Pilot",
        "dob" : "1997-03-27T05:03:00Z",
        "gender" : "m",
        "loves" : [
                "apple",
                "watermelon"
        ],
        "weight" : 650,
        "vampires" : 54
}
{
        "_id" : ObjectId("545b120902e441c9bade77be"),
        "name" : "Nimue",
        "dob" : "1999-12-20T16:15:00Z",
        "gender" : "f",
        "loves" : [
                "grape",
                "carrot"
        ],
        "weight" : 540,
        "vampires" : 49
}
{
        "_id" : ObjectId("545b120902e441c9bade77bf"),
        "name" : "Dunx",
        "dob" : "1976-07-19T19:18:00Z",
        "gender" : "m",
        "loves" : [
                "grape",
                "watermelon"
        ],
        "weight" : 704,
        "vampires" : 165
}