在 MariaDB 中创建 table 时出现 SQL 语法错误

Question

使用此代码在 Mariadb 中创建 table 时

CREATE TABLE classes(
    ClassID SMALLINT UNSIGNED PRIMARY,
    Grade TINYINT UNSIGNED,
    Subject VARCHAR(20),
    YearTaught YEAR
);

我遇到了这个错误。

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ' Grade TINYINT UNSIGNED, Subject VARCHAR(20), YearTaught YEAR )' at line 2

而且我不知道语法有什么问题。谢谢。

Answer 1

您的声明中缺少关键字 KEY，请更新

ClassID SMALLINT UNSIGNED PRIMARY,

到

ClassID SMALLINT UNSIGNED PRIMARY KEY,

您可以使用 KEY 而不是 PRIMARY KEY，但不只是 PRIMARY:

Use PRIMARY KEY (or just KEY) to make a column a primary key. A primary key is a special type of a unique key. There can be at most one primary key per table, and it is implicitly NOT NULL.

documentation is here.

在 MariaDB 中创建 table 时出现 SQL 语法错误

SQL syntax error while creating table in MariaDB

sql

mariadb