ORA-00907:缺少右括号

Question

我得到了“ORA-00907:缺少右括号”的错误，但是我检查过了，所有的括号都在那里，所以我很困惑。

我的疑问是

SELECT 
  SUM(score) as score, 
  facebook_id, 
  firstname, 
  lastname, 
  dense_rank(score) 
WITHIN GROUP ( ORDER BY score ) as rank_db  
FROM 
  (
    SELECT DISTINCT *
    FROM 
      (
        SELECT *  
        FROM fanta_score 
        ORDER BY score desc
      ) as f 
    GROUP BY 
      facebook_id, game_id
  ) as g 
GROUP BY facebook_id
ORDER BY score DESC, created_at
LIMIT 50 

我绝不是甲骨文专家，但我必须使用它，因为它必须在托管环境。

Answer 1

限制命令在Oracle中不被识别。并且应该使用ROWNUM而不是限制。

SELECT 
  SUM(score) as score, 
  facebook_id, 
  firstname, 
  lastname, 
  dense_rank(score) 
WITHIN GROUP ( ORDER BY score ) as rank_db  
FROM 
  (
    SELECT DISTINCT *
    FROM 
      (
        SELECT *  
        FROM fanta_score 
        ORDER BY score desc
      ) as f 
    GROUP BY 
      facebook_id, game_id
  ) as g
WHERE ROWNUM = 50 
GROUP BY facebook_id
ORDER BY score DESC, created_at