If you’ve searched for , you already know the classic textbook Fundamentals of Database Systems (by Ramez Elmasri and Shamkant Navathe) is a gold standard in database education. The missing piece is often the solution manual — specifically, a clear, complete, and well‑explained one.
T1 → T2 (from W1 before W2) and T2 → T1 (from R2 before W1) → cycle T1→T2→T1 .
If you want, I can also help you:
Why the Elmasri Navathe Database Systems Solution Manual Makes You a Better Engineer
Layer 1: The basic solution. Layer 2: Why the basic solution violates the entity integrity constraint. Layer 3: The "Better" solution.