Day 11 of #100DaysOfSolana flipped my database instincts upside down. I spent years thinking in tables, rows, and SQL queries but Solana’s account model is a completely different beast. Every single piece of state, whether a user’s wallet or executable program code, lives as a publicly readable account on a global ledger. There are no joins, no server-side filtering, and no admin overrides. Access control is baked into the runtime: only the owning program can modify an account’s data, and only with the right signatures. Storage isn’t a monthly cloud bill; it’s an upfront, refundable deposit in lamports per byte. The biggest shock? Transparency is the default, anyone can read your account data, no login required. This exercise built a mental bridge I know I’ll cross again and again as I dive deeper into Solana development.