This document discusses NoSQL and MongoDB. It introduces NoSQL and its characteristics like being non-SQL, horizontally scalable, schema-less, and eventually consistent. It then covers MongoDB specifically, including that it is open source, a document database written in C++ using BSON. Examples are provided of creating, querying, updating, and deleting documents using Node.js and MongoDB. MapReduce is also introduced as a way to parallel process data across collections. Finally, some well-known uses of NoSQL by companies are listed.

1. 進階使用Nodejs-淺談
NoSQL(MongoDB)
MiCloud Team Benson

2. 什麼是NoSQL
Big User

3. 什麼是NoSQL
Big Data

4. 什麼是NoSQL
五大特性
● Not Only SQL
● 水平擴充資料庫容量
● No Schema
● 資料遲早一致
● 新技術成熟度不足，版本風險

5. NoSQL的種類與特性

6. NoSQL的種類與特性

7. About Mongo DB
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Open Source
Document database
Written in C++
Bson

8. mongoDB VS SQL
Database == Database
Collections == Table
Document == Row

9. 實作Nodejs and MongoDB
安裝Mongodb

10. 範例程式
http://goo.gl/SbvZPx

11. 程式實作Create document
● npm install mongodb
var doc1 = {'hello':'doc1'};
var doc2 = {'hello':'doc2'};
var lotsOfDocs = [{'hello':'doc3'}, {'hello':'doc4'}];
collection.insert(doc1);
collection.insert(doc2, {w:1}, function(err, result) {});
collection.insert(lotsOfDocs, {w:1}, function(err, result) {});

12. 程式實作Query document
//查詢全部
collection.find().toArray(function(err, items) {})
//除了2以外
var stream = collection.find({mykey:{$ne:2}}).stream();
stream.on("data", function(item) {});
stream.on("end", function() {});
//單一筆
collection.findOne({mykey:1}, function(err, item) {});

13. 程式實作update document
collection.update({mykey:1}, {$set:{fieldtoupdate:2}}, {w:1}, function
(err, result) {});
collection.update({mykey:2}, {$push:{docs:{doc2:1}}}, {w:1}, function
(err, result) {});

14. 程式實作Delete Document
//刪除單一筆
collection.remove({mykey:1});
//刪除單一筆並傳回結果
collection.remove({mykey:2}, {w:1}, function(err, result) {});
//刪除全部
collection.remove();

15. Map-Reduce
什麼是 Map
● Function
● 平行獨立，不影響原 Collection
MAP
Collection
[{key: value},
{key: value},
{key: value}]

16. Map-Reduce

17. Map-Reduce
什麼是Reduce

18. Map-Reduce

19. NoSQL知名案例
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Facebook (Cassandra , HBase)
Twitter (Cassandra, HBase)
Yahoo(HBase)
力可科技(Cassandra)

20. 其他資源
● MongoHQ http://www.mongohq.com/home
● mongoDB
http://www.mongodb.org/

21. 謝謝大家