MongoDB Basic command

I studied mongoDB 

and This mongoDB structure is like json structure

and this has collection.

this is just start time ~ I don't know how deeply i shoud study this mongoDB

but I'm just curious about using it and be interested in getting information of this database

blow post is what i got from O'Reilly - MongoDB- The Definition Guide

34/216page

./mongodb

switch database 

> use footer

show which db i use

> db

CRUD

create, read, update, delete

javascript functions are available in mongoDB

make post data

> post = {"title":"good", 

... "content":"this is body",

... "date" : new Date()}

{

"title" : "good",

"content" : "this is body",

"date" : ISODate("2014-09-15T00:18:45.482Z")

}

and 

i gonna insert this post to blog

>db.blog.insert(post)

find 

> db.blog.find() or db.blog.findOne()

update

> post.comments = []

> db.blog.update({title:"good"}, post)

WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })

delete

> db.blog.remove({title:"good"})

show dbs = show databasenames

show collections = show collections in current database

show users = show users in current database

use <db name> = set current database to <db name>

db.help()

dob.foo.help()