Question

此查询有什么问题？

$query = 'CREATE TABLE book (
    book_id INTEGER UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, 
    book_name VARCHAR(100) NOT NULL, 
    book_type TINYINT NOT NULL DEFAULT 0 KEY, 
    book_year SMALLINT UNSIGNED NOT NULL DEFAULT 0 KEY, 
    book_author INTEGER UNSIGNED NOT NULL DEFAULT 0
    )
CREATE TABLE author (
    author_id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
    author_name VARCHAR(255) NOT NULL
)
CREATE TABLE book_category (
    book_id TINYINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, 
    book_label VARCHAR(100) NOT NULL
)
CREATE TABLE book_review (
    review_id INTEGER UNSIGNED NOT NULL KEY,
    review_name VARCHAR(255) NOT NULL, 
    review_date DATE NOT NULL, 
    review_comment VARCHAR(225) NOT NULL,
    review_ratting TINYINT UNSIGNED NOT NULL DEFAULT 0
)
ENGINE=MyISAM';

您的SQL语法有错误；检查与您的MariaDB服务器版本相对应的手册，以获取在'CREATE TABLE author（author_id INT UNSIGNED NOT NULL AUTO_INCREMENT PRI'在第8行附近）附近使用的正确语法

SQL语法多查询

0 个答案: