First week: NO CLASS

the end….

Second week: FIRST :LECTURE

On the first lecture one week after new terms start, I learned a little bit what Data Information Management about. I don’t really remember every single thing, but I do remember one particular word, ERD. The directly involve with the purpose of database design. Database design means to create database model of reality, queries SQL, modeling ERD. In this lecture I saw a glimpse of what ERD means but still not completely understand it. There are attributes, relationship and entities. Example of what I learned:

anisclick picture for a larger and clearer view

Primary key : something unique.

Foreign key : something similar that link both entities.


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s