Hey there,
From the sounds of it, you need an SQL expert who can write optimized queries.
Is that sounds about right?
I have an extensive knowledge of MSSQL 2005, 2008R2, 2012. I have also a analytic background that could be a profit in your project. I've successfuly completed micorsoft exams 70-461 (Quering SQL Server 2012) and 70-462 (Administerinf SQL Server 2012).
What is your favorite way to comunicate?
Do you want activity for all customers (sorter by Id) or only for one?
Do you want debt data in the same recordset as another row or in next recordset?
Ps.
This could be one of my first projects on Freelancer.com, so give me the chance to proof that i'm realy good business partner.