Document-oriented DB:MongoBD(1)

Introduce to Document-oriented Database: MongoBD.

Conception

• Document -> Collection -> Database
• Example: MongoDB (using in Web App)
  
  • using B-Tree as storage structure
• Object Oriented Programming
  
  • Unifying programming model and data model
  • Everything is treated as object

Document

• like json, the key-value pair
• 
• Document can be seen as object

Collection

• a class of document
• can be seen as class

Database

• some documents constitute a database
• usually for one application

Interface

Insert

> db.foo.insert({"bar":"bsd})
> db.foo.batchInsert([{"_id":0},{"_id":1},{"_id":2}])

Find

Delete

> db.foo.remove()
> db.mailing.list.remove({"opt-out":true})

Update

Useful link

• MongoDB CRUD Operations
• json
• A Technical Introduction to WiredTiger
• NoSQL Databases Explained
• Creating Great Programmers with a Software Design Studio - John Ousterhout (Stanford)