I have more than 7 Years of experience with complex queries of SQL Server. I can do following task for your:
1. Consultancy to simplify your database structure 2. Consultancy to develop state of the art database structure 3. Develop Role management database structure so you can define role management in your application 4. Optimize your queries 5. Write any Sql server queries to minimize complexity.
If you have any other requirement related to SQL Server please feel free to contact.