床位表字段名称改成英文的

修改后的MySQL脚本：

-- 创建床位表
CREATE TABLE IF NOT EXISTS bed_info (
    ID INT UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '床位表的唯一标识符',
    Bed_Number INT UNSIGNED NOT NULL COMMENT '床位编号',
    Room_Number INT UNSIGNED NOT NULL COMMENT '房间编号',
    Elderly_Name VARCHAR(100) NOT NULL COMMENT '老人名称',
    Status CHAR(2) NOT NULL COMMENT '床位状态',
    Created_Time DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
    Modified_Time DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '修改时间',
    PRIMARY KEY (ID),
    UNIQUE KEY (Bed_Number, Room_Number)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='床位表';

测试数据：

-- 插入测试数据
INSERT INTO bed_info (Bed_Number, Room_Number, Elderly_Name, Status) VALUES
(1, 101, '张三', '空闲'),
(2, 101, '李四', '已占用'),
(3, 102, '王五', '已占用'),
(4, 102, '赵六', '空闲'),
(5, 103, NULL, '空闲');