(I) NoSQL Database

•        1) What is NoSQL Database?
                  Non-Relational Database
                  Relational Database or NoSQL Database
                  SQL is a standard query language for relational databases
                  There is no standard query language for NoSQL databases
•        2) Why we need NoSQL?
                  a) Simple Design
                  b) Flexible Design
                  c) Distributed Design (Scale Horizontally)
                          Scale Out / Scale Up
                  d) Query Performance
•        3) How many types of NoSQL?
                  a) Column Store
                  b) Document Store
                  c) Graph Store
                  d) Key-Value Store
                  e) Object Store
                  f) ... Wiki and Guide
•        4) Real NoSQL Databases:
                  a) Column Store: Vertica
                  b) Document Store: MongoDB
                  c) Graph Store: Neo4j
                  d) Key-Value Store DynamoDB

(II) Document Store

•        1) What is XML?
                  Extensible Markup Language
                  XML Tutorial
•        2) What is XQuery?
                  Language for querying XML data.
                  XQuery for XML / SQL for relational databases.
                  XQuery Tutorial
                  There are many implementations of XQuery
•        3) What is JSON?
                  JavaScript Object Notation
                  Binary JSON (BSON)
                  JSON Tutorial
                  From AJAX to AJAJ
                  Java API for JSON
•        4) MongoDB
                  Open-source Document Database
                  Most Popular Document Database
                  Use "Aggregation" and "Aggregation Pipeline" for query.

(III) Graph Database

•        1) What is Graph?
                  Graph is an abstract data type
                  Social Network, Transportation Network, Communication Network, etc.
•        2) Neo4j
                  Open-source Graph Database
                  Most Popular Graph Database
                  Use "Cypher Query Language" for query.