Question

我有点困惑，我的遗失左括号正在发挥作用（ORA-00906：缺少左括号）。有什么建议？下面是一个具有明显测试名称的类似语法的示例。谢谢你的任何建议！

CREATE TABLE rosters (
        rosterid    NUMBER(5) PRIMARY KEY,
        playerid    NUMBER(5) NOT NULL,
        teamid      NUMBER(5) NOT NULL,
        seasonid    NUMBER(5) NOT NULL,
CONSTRAINT fk_player FOREIGN KEY playerid REFERENCES players(playerid),
CONSTRAINT fk_team FOREIGN KEY teamid REFERENCES teams(teamid),
CONSTRAINT fk_season FOREIGN KEY seasonid REFERENCES season(seasonid);

Answer 1

似乎相当不言自明......您需要将FK列名称放在括号中，as shown in the syntax diagram：

CREATE TABLE rosters (
        rosterid    NUMBER(5) PRIMARY KEY,
        playerid    NUMBER(5) NOT NULL,
        teamid      NUMBER(5) NOT NULL,
        seasonid    NUMBER(5) NOT NULL,
CONSTRAINT fk_player FOREIGN KEY (playerid) REFERENCES players(playerid),
--                               ^        ^
CONSTRAINT fk_team FOREIGN KEY (teamid) REFERENCES teams(teamid),
--                             ^      ^
CONSTRAINT fk_season FOREIGN KEY (seasonid) REFERENCES season(seasonid));
--                               ^        ^                            ^

我也为整个声明添加了缺少的右括号。

使用虚构参考表进行快速演示：

CREATE TABLE players (playerid number(5) PRIMARY KEY);

Table PLAYERS created.

CREATE TABLE teams (teamid number(5) PRIMARY KEY);

Table TEAMS created.

CREATE TABLE season (seasonid number(5) PRIMARY KEY);

Table TEAMS created.

CREATE TABLE rosters (
        rosterid    NUMBER(5) PRIMARY KEY,
        playerid    NUMBER(5) NOT NULL,
        teamid      NUMBER(5) NOT NULL,
        seasonid    NUMBER(5) NOT NULL,
CONSTRAINT fk_player FOREIGN KEY (playerid) REFERENCES players(playerid),
CONSTRAINT fk_team FOREIGN KEY (teamid) REFERENCES teams(teamid),
CONSTRAINT fk_season FOREIGN KEY (seasonid) REFERENCES season(seasonid));

Table ROSTERS created.

Answer 2

你在赛季后缺少一个右括号（seasonId）。

缺少左括号错误 - 创建外键

2 个答案: