SQL缺少右括号

Question

我正尝试使用SQL Developer创建视图并遇到奇怪的错误。似乎有一个右括号缺失，但我找不到哪里 - 你能帮我吗？

输入：

CREATE OR REPLACE VIEW MAST_SOMME_POINTS_CLUBS AS 
    (SELECT C.NOM, SUM(R.POINTS) AS POINTS 
    FROM MAST_CLUBS C 
    JOIN MAST_NAGEURS N USING(CLUB) 
    JOIN MAST_RESULTATS R USING(NRLIGUE) 
    GROUP BY (C.CLUB, C.NOM) 
    ORDER BY C.NOM); 

OUTPUT：

Erreur commençant à la ligne: 1 de la commande - 
CREATE OR REPLACE VIEW MAST_SOMME_POINTS_CLUBS AS 
    (SELECT C.NOM, SUM(R.POINTS) AS POINTS 
    FROM MAST_CLUBS C 
    JOIN MAST_NAGEURS N USING(CLUB) 
    JOIN MAST_RESULTATS R USING(NRLIGUE) 
    GROUP BY (C.CLUB, C.NOM) 
    ORDER BY C.NOM) 
Rapport d'erreur - 
Erreur SQL : ORA-00907: missing right parenthesis 
00907. 00000 - "missing right parenthesis" 
*Cause:  
*Action: 

Answer 1

只要避免使用不必要的括号：

CREATE OR REPLACE VIEW MAST_SOMME_POINTS_CLUBS AS 
    SELECT 
     C.NOM, 
     SUM(R.POINTS) AS POINTS 
    FROM 
     MAST_CLUBS C 
    JOIN 
     MAST_NAGEURS N 
     USING (CLUB) 
    JOIN 
     MAST_RESULTATS R 
     USING (NRLIGUE) 
    GROUP BY 
     C.CLUB, -- Is this intentional? It is not in your SELECT 
     C.NOM 
    ORDER BY NOM; 

有一个小窍门：让你的代码干净的布局，结构良好的帮助避免很多问题。