フォーマッター＆コード
SQLクエリ説明ツール
Format any SQL and explain what each clause does.
Runs in your browser
Formatted
SELECT u.name, COUNT(p.id) AS posts FROM users u LEFT JOIN posts p ON p.author_id = u.id WHERE u.created_at > '2024-01-01' GROUP BY u.id ORDER BY posts DESC LIMIT 10;
What this does
📋 Returns: u.name, COUNT(p.id) AS posts 📂 From: users u LEFT 🔗 LEFT JOIN posts ON p.author_id = u.id 🔍 Filter: u.created_at > '2024-01-01' 📊 Group by: u.id ↕️ Order by: posts DESC 📏 Limit: 10 rows
編集者注
Understanding · Read the plan, find the seq-scan, add the index.
この詳細な解説章は現在、英語版のみで提供されています。上の変換ツールはあなたの言語で動作しますが、長文の解説記事はまだ翻訳されていません。
よくある質問
Quick answers.
›Does this tool execute my query against a database?
No. The tool performs static analysis of the syntax and structure locally in your browser without connecting to any external database.
›Which SQL dialects are supported?
The explainer supports standard ANSI SQL, as well as common variations used in PostgreSQL, MySQL, SQL Server, and SQLite.
›Will it catch errors in my SQL syntax?
Yes. If the query is malformed, the parser will identify the location of the syntax error so you can correct it before running it in production.
›Is my query data sent to a server?
Zero data is transmitted. The logic for formatting and explaining the SQL clauses runs entirely on your device using client-side scripts.
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