mysql执行顺序与join连接

 

 

手写顺序

 

SELECT DISTINCT
    
FROM 
     join  JOIN  ON 
WHERE
    
GROUP BY
         
HAVING
      
ORDER BY
    
LIMIT      
  
机读顺序
 
  
 1. FROM 
 2. ON 
 3.  JOIN 
 4. WHERE 
 5. GROUP BY  
 6. HAVING 
 7. SELECT 
 8. DISTINCT 
 9. ORDER BY 
 10. LIMIT 

sql语句的执行顺序可以用这张鱼骨图来表示