Created table idea. Since every user can either participate or not participate in a specific idea, it needs implementation of this functionality somehow. I think that a good way of doing it could be on both - the idea and the user tables, making additional fields in both tables. The field 'ideas' in the table 'user' could make the user's idea list to appear faster, and the field 'users' on the table 'idea' could make the users that are participating in the idea appear faster. That perhaps needs functions for managing the data of these cells.