COMP9311 Database Systems WEEK1：
什么是database，database中的重要概念，什么是data，什么是DBMS，什么是database system，Database Users，DBMS，数据库开发流程，数据库语言，Data Modeling，ER Model，ER Diagrams，entity sets，attributs的keys，relational sets，Subclasses and Inheritance
COMP9311 Database Systems WEEK2：
ER Model，Relational Data Model（Core values，Notice，Integrity Constraints，Describing Relational Schemas），Mapping ER Designs to Relational Schemas（Mapping strong entities，Mapping weak entities）
COMP9311 Database Systems WEEK3：
from 2-way to n-way relationships，Mapping composite attributes，Mapping multi-valued attributes，Derived attributes，Mapping subclasses，Mapping disjoint subclass，Mapping overlapping subclass，Relational DBMSs，Building/Maintaining Databases
COMP9311 Database Systems WEEK4：
SQL基本语法，Regular Expression基本语法
COMP9311 Database Systems Lab1：
配置PostgreSQL环境
COMP9311 Database Systems Lab2&3：
应用postgreSQL实现一个ER design
