似乎无法调试MySQL错误“＃1064

Question

我相信这个问题已经被问了很多次了。 如果有人可以看看它会很棒

我得到＃1064 - 你的SQL语法有错误;检查与您的MySQL服务器版本相对应的手册，在正确的语法中使用 'REFERENCES interests（interests_id）'''），同时使用interests.interest_id创建category_interests和event_attendees表作为定义外键的参考。

我似乎无法找到它的原因。

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

的错误，我发现：

1. 你忘了通过()围住外键列。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....（不带圆括号）
2. 某处您使用了interests_id。但你应该使用 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