I have an approach. I can share it personally because of availability to opponents.
about me:
I have deep and proven experience in T-SQL development and debugging of queries with huge complexity. My total MSSQL Experience is 10+ years. Five of them was within USA company as Senior SQL/BI Developer. My everyday duties were: development of different types of reports, dashboards, KPIs, ETLs and functional modules for application`s data layer, Investigation and resolution of performance and locking issues on high loaded production environment. You could accept me and i will share my expertise with you.