add test message
Add readme in doc
create new erd design file
update erd design
design 3 tables users, posts and comments
update table design with sample data
Edit file BLOG_TABLE_Design- add lastname, firstname column in users
add sql script for create db
add create_at , modified_at into tables users
set encoding for db, at created and modified columns
add relationship posts-comment
edit tables name without 's'
Merge pull request #1 from lam-vy-mulodo/18095_DATABASE_DESIGN

18095_DATABASE_DESIGN