CREATE TABLE `admin` ( `admin_id` int(11) NOT NULL AUTO_INCREMENT, `admin_name` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL, `admin_number` int(11) NOT NULL AUTO_INCREMENT, PRIMARY KEY (`admin_id`) USING BTREE, )ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC;这段代码有什么错误，怎样改

这段代码有一个错误，即 `admin_number` 列的定义不正确。`AUTO_INCREMENT` 属性只能应用于主键列，而 `admin_number` 列不是主键列，因此不能使用 `AUTO_INCREMENT` 属性。此外，`admin_number` 列的数据类型也没有指定，应该为整数类型。

应该将代码修改为：

CREATE TABLE `admin` (
   `admin_id` int(11) NOT NULL AUTO_INCREMENT,
   `admin_name` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
   `admin_number` int(11) NOT NULL,
   PRIMARY KEY (`admin_id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC;

修改后的代码中，`admin_number` 列的定义变为了 `int(11) NOT NULL`，去掉了 `AUTO_INCREMENT` 属性，同时在主键定义中指定了使用 BTREE 索引算法。

相关问题

USE `sys`; DROP TABLE IF EXISTS `admin`; CREATE TABLE `admin` ( `admin_id` int(11) NOT NULL AUTO_INCREMENT, `admin_name` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL, `admin_password` varchar(50) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, PRIMARY KEY (`admin_id`) USING BTREE ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC; insert into `admin`(`admin_id`,`admin_name`,`admin_password`) values (1,'zxc','abc'),(2,'qwe','acc'); DROP TABLE IF EXISTS `user`; CREATE TABLE `user` ( `user_id` int(11) NOT NULL AUTO_INCREMENT, `user_name` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL, `user_password` varchar(50) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, PRIMARY KEY (`user_id`) USING BTREE, ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC;这段语句的错误

这段语句有一个错误，就是在创建`user`表的语句中，最后有一个逗号，导致语法错误。正确的语句应该是：

USE `sys`; 
DROP TABLE IF EXISTS `admin`; 
CREATE TABLE `admin` (
    `admin_id` int(11) NOT NULL AUTO_INCREMENT,
    `admin_name` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
    `admin_password` varchar(50) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
    PRIMARY KEY (`admin_id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC; 

INSERT INTO `admin`(`admin_id`, `admin_name`, `admin_password`) 
VALUES (1, 'zxc', 'abc'), (2, 'qwe', 'acc'); 

DROP TABLE IF EXISTS `user`; 
CREATE TABLE `user` (
    `user_id` int(11) NOT NULL AUTO_INCREMENT,
    `user_name` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
    `user_password` varchar(50) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
    PRIMARY KEY (`user_id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC;

CREATE TABLE `tb_admin` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键', `account` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '账号', `password` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '密码', `name` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '姓名', PRIMARY KEY (`id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;

这是一个创建名为 `tb_admin` 的表的 SQL 语句，表中包含了四个字段：`id`、`account`、`password` 和 `name`。其中 `id` 是主键，也是自动递增的。`account` 是账号，`password` 是密码，`name` 是姓名。这个表使用的存储引擎是 InnoDB，字符集为 utf8mb4，行格式为 Dynamic。