QueryLens
Paste a SQL query and get a plain-English explanation of what it does, plus a list of likely-slow patterns tagged Low, Medium, or High, so you know where to look before it hits production.
Try:
Explanation
The explanation appears here: what the query does, performance flags tagged Low / Medium / High, and a note.
AI explanations can be wrong. Performance flags are heuristic guesses, not a substitute for EXPLAIN on your real data.