Question

我确信这个问题已被多次询问过。如果有人能看一眼就会很棒

我得到＃1064 - 你的SQL语法有错误;检查与MySQL服务器版本对应的手册，以获得正确的语法在使用interests.interest_id作为定义外键的参考创建category_interests和event_attendees表时，'REFERENCES interest（interests_id））'附近。

我似乎无法找到原因。

SET foreign_key_checks = 0;

DROP table IF EXISTS categories;
CREATE table categories(
  category_id int AUTO_INCREMENT,
  category_name VARCHAR(40),
  category_desc TEXT,
  CONSTRAINT pk_categories PRIMARY KEY (category_id)
);

DROP table IF EXISTS interests;
CREATE table interests(
  interest_id int AUTO_INCREMENT,
  interest_name varchar(40),

  CONSTRAINT pk_interests PRIMARY KEY (interest_id)
);


-- ERROR - query does not run 
DROP table IF EXISTS category_interests;
CREATE table category_interests(
  interest_id int,
  category_id int,
  CONSTRAINT fk_interests FOREIGN KEY interest_id REFERENCES interests(interest_id),
  CONSTRAINT fk_categories FOREIGN KEY category_id REFERENCES categories(category_id)
);

-- ERROR - query does not run
DROP table IF EXISTS event_atendees;
CREATE table event_atendees(
     attendee_id int AUTO_INCREMENT,
    interest_id int,
    lat double,
    lon double,
    name varchar(115),
    dob date,
    gender CHAR(1),

  CONSTRAINT pk_event_atendees PRIMARY KEY (attendee_id),
  CONSTRAINT fk_intrests_ea FOREIGN KEY interests_id REFERENCES `interests`(interests_id)
);

SET foreign_key_checks = 1;

Answer 1

我发现的错误：

您忘记用()括起外键列。它应该是 CONSTRAINT fk_interests FOREIGN KEY (interest_id) REFERENCES interests(interest_id)。它不应该是CONSTRAINT fk_interests FOREIGN KEY interest_id....（没有括号）
您使用interests_id的地方。但你应该用过 interest_id。

试试这个：

SET foreign_key_checks = 0;

DROP table IF EXISTS categories;
CREATE table categories(
  category_id int AUTO_INCREMENT,
  category_name VARCHAR(40),
  category_desc TEXT,
  CONSTRAINT pk_categories PRIMARY KEY (category_id)
);

DROP table IF EXISTS interests;
CREATE table interests(
  interest_id int AUTO_INCREMENT,
  interest_name varchar(40),

  CONSTRAINT pk_interests PRIMARY KEY (interest_id)
);


-- ERROR - query does not run 
DROP table IF EXISTS category_interests;
CREATE table category_interests(
  interest_id int,
  category_id int,
  CONSTRAINT fk_interests FOREIGN KEY (interest_id) REFERENCES interests(interest_id),
  CONSTRAINT fk_categories FOREIGN KEY (category_id) REFERENCES categories(category_id)
);

-- ERROR - query does not run
DROP table IF EXISTS event_atendees;
CREATE table event_atendees(
     attendee_id int AUTO_INCREMENT,
    interest_id int,
    lat double,
    lon double,
    name varchar(115),
    dob date,
    gender CHAR(1),

  CONSTRAINT pk_event_atendees PRIMARY KEY (attendee_id),
  CONSTRAINT fk_intrests_ea FOREIGN KEY (interest_id) REFERENCES `interests`(interest_id)
);

SET foreign_key_checks = 1;

WORKING DEMO

似乎无法调试MySQL错误“＃1064

1 个答案: