Question

我的SQL代码出错，但无法理解，它在哪里。拜托，帮我解决一下。这是我的代码：

CREATE TABLE IF NOT EXISTS Records (
record_id int(11) NOT NULL AUTO_INCREMENT,
record_year year(4) NOT NULL,
record_quarter int(1) NOT NULL,
profit_tax int(11) NOT NULL,
PRIMARY KEY (record_id, record_year, record_quarter),
UNIQUE(record_year, record_quarter)
);

CREATE TABLE IF NOT EXISTS ProductsList (
product_id int(11) NOT NULL AUTO_INCREMENT,
product_name varchar(24) NOT NULL,
PRIMARY KEY (product_id)
);

该表中存在错误：

CREATE TABLE IF NOT EXISTS RecordsProducts (
recordproduct_id int(11) NOT NULL AUTO_INCREMENT,
...
PRIMARY KEY (recordproduct_id),
FOREIGN KEY (record_id) REFERENCES Records (record_id),
FOREIGN KEY (product_id) REFERENCES ProductsList (record_id)
  );

Answer 1

引用列应为INDEX
引用列应具有相同的引用列数据类型

两个引用，引用表应该是InnoDB

CREATE TABLE IF NOT EXISTS RecordsProducts (
    ...
    ...
    record_id int NOT NULL,  <=== check data type
    product_id int NOT NULL,

    INDEX(record_id), <===== check INDEXed or not
    INDEX(product_id), <====

    FOREIGN KEY (record_id) REFERENCES Records (record_id),
    FOREIGN KEY (product_id) REFERENCES ProductsList (record_id)
) ENGINE = InnoDB; <=== add 'ENGINE=InnoDB' explicitly

Errno：MySQL数据库中有150个

1 个答案: