ERDSQLTutor app for iPhone and iPad

A mobile tutorial application focus on teaching users to draw ER diagram and write SQL queries. There are two-sub applications. The first is ERD Tutor, which focus on guide the user to draw a ER diagram with given constrain. The second is SQL Tutor, which focus on teaches user how to write a SQL query. Both applications require user to fulfill the question requirement. If the answer from user is incorrect, there will be a hint provided for them to rethink the incorrect part of the answer. For ERD Tutor, user can drag out ERD element from the control menu. Also entities and attributes name will be given. For SQL Tutor, user needs to write a SQL query to answer the question. A SQL formatter a provided for user such that they can easy read and write SQL.