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AI SQL Query Explainer

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About this tool

Find out what a query really returns, where it will be slow, and whether it is about to delete everything.

SQL reads like English right up to the point where it does not. A join condition slightly off produces a result set that looks reasonable and is quietly wrong, and nothing warns you.

Paste the query and get a plain-English account of what it actually returns, then whichever focus you need. Optimisation names the index that would help and why — with the honest caveat that it cannot see your query plan, table sizes or existing indexes, which is where the real answer lives. The risk pass always calls out an UPDATE or DELETE with no WHERE clause, and joins that will fan out rows in ways people rarely intend. Dialect matters: what is valid in Postgres is a syntax error in MySQL often enough to be worth setting.

How to use

  1. Paste your SQL query, choose your database dialect, and pick whether you want it explained, optimised or risk-checked
  2. Press Generate and give it a few seconds.
  3. Copy what you need, or generate again for a different take — every run is fresh.

Frequently asked questions

It suggests indexes and rewrites based on the query text, but it cannot see your data volumes, existing indexes or query plan. Always confirm with EXPLAIN against your real database.

It always flags an UPDATE or DELETE without a WHERE clause and joins likely to multiply rows. It is a review, not a safety net — test destructive statements in a transaction you can roll back.

Date functions, string handling, LIMIT versus TOP, and upsert syntax all differ. Setting the dialect avoids advice that is valid somewhere else and a syntax error for you.

No. Your input is sent to the AI provider this site is configured to use purely to generate your result, and is not stored here afterwards. There is no account for it to be attached to. Even so, keep passwords, financial details and other people's private information out of it.

The site owner selects one model that powers every tool here, so there is nothing for you to configure. Describe what you need, press Generate, and read the result before you use it.