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![![](https://img.kancloud.cn/78/19/7819faef655aadc13c13e674a4f84e50_474x422.png)](images/screenshot_1648363455362.png) ``` 书写顺序 1. SELECT DISTINCT 2. FROM 3. JOIN ON 4. WHERE 5. GROUP BY 6. HAVING 7. ORDER BY 8. LIMIT 执行顺序 1. FROM 2. ON 3. JOIN 4. WHERE 5. GROUP BY 6. HAVING 7. SELECT 8. DISTINCT 9. ORDER BY 10. LIMIT ```