數據庫SQL錯誤：ORA-02270：此列列表沒有匹配的唯一或主鍵

我正在創建一個簡單的數據庫，並且一直遇到此錯誤，ORA-02270：此列列表沒有匹配的唯一或主鍵。我一直試圖解決這個問題超過一天，我不明白我做錯了什麼。我已經看過關於這個錯誤的其他帖子，但不明白我在這裏做錯了什麼。數據庫SQL錯誤：ORA-02270：此列列表沒有匹配的唯一或主鍵

創建沒有任何問題的表是TEAMS，PLAYERS和GAMES表。當我嘗試創建TEAM_GAME_STATS或PLAYER_GAME_STATS表時，出現此錯誤。我注意到如果我從這兩個表中刪除外鍵約束，那麼創建它們就沒有問題;但我想這可能會導致數據問題？如果有人能夠查看我的代碼並告訴我我可能做錯了什麼，或者指引我朝着正確的方向，我將不勝感激。我已將表格簡化爲只有主鍵/外鍵，因此沒有過多的代碼。

CREATE TABLE teams (
    team VARCHAR2(50), 
    CONSTRAINT teams_pk PRIMARY KEY (team) 
); 

CREATE TABLE players (
    player_id   NUMBER, 
    team    VARCHAR2(50), 
    CONSTRAINT players_pk PRIMARY KEY (player_id), 
    CONSTRAINT players_fk_team FOREIGN KEY (team) 
    REFERENCES teams (team) 
); 

CREATE TABLE games (
    game_number NUMBER, 
    player_id  NUMBER, 
    team   VARCHAR2(50), 
    CONSTRAINT games_pk PRIMARY KEY (game_number, player_id, team), 
    CONSTRAINT games_fk_player_id FOREIGN KEY (player_id) 
    REFERENCES players (player_id), 
    CONSTRAINT games_fk_team FOREIGN KEY (team) 
    REFERENCES teams (team) 
); 

CREATE TABLE team_game_stats (
    game_number    NUMBER, 
    team      VARCHAR2(50), 
    CONSTRAINT team_game_stats_pk PRIMARY KEY (game_number, team), 
    CONSTRAINT team_game_stats_fk_game_number FOREIGN KEY (game_number) 
    REFERENCES games (game_number), 
    CONSTRAINT team_game_stats_fk_team FOREIGN KEY (team) 
    REFERENCES games (team), 
); 

CREATE TABLE player_game_stats (
    game_number    NUMBER, 
    player_id     NUMBER, 
    CONSTRAINT player_game_stats_pk PRIMARY KEY (game_number, player_id), 
    CONSTRAINT player_game_stats_fk_game_number FOREIGN KEY (game_number) 
    REFERENCES games (game_number), 
    CONSTRAINT player_game_stats_fk_player_id FOREIGN KEY (player_id) 
    REFERENCES games (player_id), 
); 

CREATE INDEX players_team_idx 
    ON players (team); 

CREATE INDEX games_player_id_idx 
    ON games (player_id); 
CREATE INDEX games_team_idx 
    ON games (team); 

CREATE INDEX team_game_stats_game_number_idx 
    ON team_game_stats (game_number); 
CREATE INDEX team_game_stats_team_idx 
    ON team_game_stats (team); 

CREATE INDEX player_game_stats_game_number_idx 
    ON player_game_stats (game_number); 
CREATE INDEX player_game_stats_player_id_idx 
    ON player_game_stats (player_id);

來源

2016-08-07 Nasir

問題在這裏** CONSTRAINT games_pk PRIMARY KEY（game_number，player_id，team）** team_game_stats表不能在遊戲桌上提供一個唯一的主鍵。 –

外鍵是對另一個表的主鍵的引用。

Oracle SQL: Receiving 'no matching unique or primary key' error and don't know why

變化

CONSTRAINT games_pk PRIMARY KEY (game_number, player_id, team)

到

CONSTRAINT games_pk PRIMARY KEY (game_number, team)

而且改變

CONSTRAINT team_game_stats_fk_game_number FOREIGN KEY (game_number) 
REFERENCES games (game_number), 
CONSTRAINT team_game_stats_fk_team FOREIGN KEY (team) 
REFERENCES games (team),

是

CONSTRAINT team_game_stats_game_fk FOREIGN KEY (game_number, team) 
REFERENCES games (game_number, team)

並執行類似於player_game_stats的操作。

您可能需要擺弄每張桌子的鑰匙。重要的是，表中的外鍵應該包含與它引用的表的主鍵相同的列。

來源

2016-08-07 18:31:43

數據庫SQL錯誤：ORA-02270：此列列表沒有匹配的唯一或主鍵

回答

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