格式化与代码
SQL 查询解释器
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
编辑注
Understanding · Read the plan, find the seq-scan, add the index.
本深度章节目前仅有英文版本。上方的转换工具支持您的语言;长篇说明文章尚未翻译。
常见问题
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.
大家也在搜索
相关工具