NOSQL 之 Document Database 之 MongoDB

Official siste:
http://www.mongodb.org/

MongoDB Manual Contents:
http://docs.mongodb.org/manual/contents/

Java relates( especially Java Language Center ):
http://docs.mongodb.org/ecosystem/drivers/#java

MongoDB API Docs for java:
http://api.mongodb.org/java/

Spring Data MongoDB - Reference Documentation:
http://static.springsource.org/spring-data/data-mongodb/docs/current/reference/html/index.html

The Little MongoDB Book： (即附件)
http://openmymind.net/mongodb.pdf

引用

To get started, there are six simple concepts we need to understand.
1. MongoDB has the same concept of a database with which you are likely already familiar (or a schema for you Oracle
folks). Within a MongoDB instance you can have zero or more databases, each acting as high-level containers for
everything else.
2. A database can have zero or more collections. A collection shares enough in common with a traditional table
that you can safely think of the two as the same thing.
3. Collections are made up of zero or more documents. Again, a document can safely be thought of as a row.
4. A document is made up of one or more fields, which you can probably guess are a lot like columns.
5. Indexes in MongoDB function much like their RDBMS counterparts.
6. Cursors are different than the other five concepts but they are important enough, and often overlooked, that I
think they are worthy of their own discussion. The important thing to understand about cursors is that when you
ask MongoDB for data, it returns a cursor, which we can do things to, such as counting or skipping ahead, without
actually pulling down data.

与 RDBMS 对应关系：
collection vs. table, document vs. row and field vs. column
http://docs.mongodb.org/manual/reference/sql-comparison/


MongonDB Shell:

# 查看帮助；这个最有用！其他的大体都在里头
> help
# display current database
> db
# remove all documents from a collection, 注意只是删除该collection中的所有documents，并不删除该collection
> db.<collection_name>.remove()
# drop collection from the database，这个才是删除 collection，整个 collection，包括其中的 documents 和其对应的 indexes，都将被彻底删除，该 collection 在被 drop 后将不复存在
> db.<collection_name>.drop()