錯誤1247（42S22）：不支持參考'VITORIAS'（引用組功能）

Question

我無法創建視圖。下面你可以找到我的代碼。有人能幫助我嗎？

CREATE VIEW V_Campeonato AS SELECT team.tim_cod_inscri_time 
     , SUM(CASE WHEN partida.par_gol_mand > partida.par_gol_visi THEN 1 ELSE 0 END) AS VITORIAS 
     , SUM(CASE WHEN partida.par_gol_mand = partida.par_gol_visi THEN 1 ELSE 0 END) AS EMPATES 
     , SUM(CASE WHEN partida.par_gol_mand < partida.par_gol_visi THEN 1 ELSE 0 END) AS DERROTAS 
FROM team 
INNER JOIN partida 
ON team.tim_cod_inscri_time = partida.par_cod_partida 
ORDER BY (VITORIAS * 3 + EMPATES) DESC; 

ERROR 1247（42S22）：參考 'VITORIAS' 不支持（參考 組功能）

Answer 1

這是很難完全理解您在此代碼會什麼。但是，這可能是你所追求的：

SELECT SUM(VITORIAS), SUM(EMPATES), SUM(DERROTAS), tim_cod_inscri_time FROM 

    (SELECT 
    (CASE WHEN partida.par_gol_mand > partida.par_gol_visi THEN 1 ELSE 0 END) AS VITORIAS , 
    (CASE WHEN partida.par_gol_mand = partida.par_gol_visi THEN 1 ELSE 0 END) AS EMPATES , 
    (CASE WHEN partida.par_gol_mand < partida.par_gol_visi THEN 1 ELSE 0 END) AS DERROTAS 
    FROM team INNER JOIN partida ON team.tim_cod_inscri_time = partida.par_cod_partida) 
    AS teamrecord 
    GROUP BY tim_cod_inscri_time 
    ORDER BY (VITORIAS * 3 + EMPATES) DESC; 

我把SUM從內表，並分別總結了勝利。另外，我給了子查詢一個任意的名字，teamrecord。這是你要去的嗎？