Advanced Databases Exam Drafting

I'm searching for an expert in Advanced Databases who can construct an exam paper of advanced difficulty.

Ideal Skills and Experience:
- Comprehensive knowledge of Advanced Databases
- Experience in creating exam papers and academic content

Requirements:
- The exam paper should contain 10-20 questions
- Questions should be of advanced difficulty level
- Questions should test in-depth knowledge of Relational algebra, sql queries and intro concepts of databases

Please ensure the draft is challenging and appropriately represents Advanced Databases.