修改总体sql
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create table article
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(
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id bigint auto_increment
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primary key,
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title varchar(100) not null,
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topic varchar(50) not null,
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excerpt varchar(255) not null,
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cover varchar(255) not null,
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content text not null,
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create_at datetime default (now()) not null,
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update_at datetime default (now()) not null on update CURRENT_TIMESTAMP,
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is_delete tinyint not null
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);
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create table baseoverview
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(
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id int auto_increment
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primary key,
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introduction longtext null comment '基地简介',
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regulations longtext null comment '规章制度',
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address varchar(255) null,
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phone varchar(20) null,
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email varchar(100) null,
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website varchar(100) null,
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director varchar(255) null comment '主任姓名',
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deputy_director varchar(255) null comment '副主任姓名',
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researchers varchar(255) null comment '研究人员'
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);
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create table course
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(
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id int auto_increment comment '课程ID（主键）'
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primary key,
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title varchar(255) not null comment '课程标题',
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subtitle varchar(255) default '' null comment '课程副标题',
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cover_url varchar(512) default '' null comment '课程封面图URL',
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intro text null comment '课程简介（对应“课程简介”模块）',
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status tinyint default 1 null comment '课程状态（0删除，1-已发布）',
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create_time datetime default CURRENT_TIMESTAMP null comment '创建时间',
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update_time datetime default CURRENT_TIMESTAMP null on update CURRENT_TIMESTAMP comment '更新时间'
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)
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comment '课程主表' charset = utf8mb4;
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create table course_activity
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(
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id int auto_increment comment '活动ID（主键）'
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primary key,
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course_id int not null comment '关联课程ID（外键）',
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title varchar(255) not null comment '活动标题（如“第1章作业”“期中测试”）',
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activity_type tinyint default 1 null comment '活动类型（1-作业，2-考试，3-讨论，4-直播）',
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content text null comment '活动详情（如作业要求、考试说明）',
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start_time datetime null comment '活动开始时间（如直播时间、作业发布时间）',
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end_time datetime null comment '活动结束时间（如作业截止时间）',
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sort int default 0 null comment '排序',
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constraint fk_activity_course
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foreign key (course_id) references course (id)
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on delete cascade
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)
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comment '学生活动表' charset = utf8mb4;
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create index idx_course_id
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on course_activity (course_id)
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comment '按课程查询活动';
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create table course_content
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(
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id int auto_increment comment '内容ID（主键）'
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primary key,
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course_id int not null comment '关联课程ID（外键）',
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parent_id int default 0 null comment '父级ID（0表示章节，>0表示小节，关联自身id）',
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title varchar(255) not null comment '章节/小节标题',
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content text null comment '内容详情（如视频地址、图文内容等）',
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sort int default 0 null comment '排序（数字越小越靠前）',
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constraint fk_content_course
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foreign key (course_id) references course (id)
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on delete cascade
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)
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comment '课程内容表（章节/小节）' charset = utf8mb4;
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create index idx_course_id
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on course_content (course_id)
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comment '按课程查询内容';
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create index idx_parent_id
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on course_content (parent_id)
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comment '按父级查询子内容';
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create table course_resource
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(
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id int auto_increment comment '资源ID（主键）'
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primary key,
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course_id int not null comment '关联课程ID（外键）',
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title varchar(255) not null comment '资源标题（如“第1章课件.pdf”）',
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resource_url varchar(512) not null comment '资源文件URL（如PDF、压缩包地址）',
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size int default 0 null comment '文件大小（KB）',
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sort int default 0 null comment '排序',
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constraint fk_resource_course
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foreign key (course_id) references course (id)
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on delete cascade
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)
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comment '课程拓展资源表' charset = utf8mb4;
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create index idx_course_id
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on course_resource (course_id)
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comment '按课程查询资源';
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create table course_teacher
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(
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id int auto_increment comment '关联ID（主键）'
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primary key,
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course_id int not null comment '关联课程ID（外键）',
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teacher_id int not null comment '教师ID（建议关联用户表user.id）',
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name varchar(100) not null comment '教师姓名',
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title varchar(200) default '' null comment '教师头衔（如“XXX大学教授”）',
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avatar varchar(512) default '' null comment '教师头像URL',
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intro text null comment '教师简介',
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sort int default 0 null comment '排序（团队展示顺序）',
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constraint fk_teacher_course
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foreign key (course_id) references course (id)
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on delete cascade
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)
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comment '教学团队表' charset = utf8mb4;
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create index idx_course_id
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on course_teacher (course_id)
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comment '按课程查询教师';
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create table devproject
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(
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id int not null comment '基地开放项目ID'
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primary key,
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basic_dev_project_management_system text null comment '基础开发项目管理制度',
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basic_dev_project_initiation_result text null comment '基础开发项目立项结果',
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basic_dev_project_midterm_inspection text null comment '基础开发项目中期检查',
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basic_dev_project_achievements text null comment '基础开发项目成果'
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)
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comment '基地开放项目表';
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create table meeting
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(
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id int auto_increment comment '会议ID（主键）'
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primary key,
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theme varchar(255) not null comment '会议主题',
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subtitle varchar(255) default '' null comment '会议副标题（允许为空）',
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intro text null comment '会议简介（支持长文本，可存Markdown）',
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cover_url varchar(512) default '' null comment '会议封面图片URL（允许为空）',
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schedule_image_url varchar(512) default '' null comment '会议日程图片URL（允许为空，无日程图时存空字符串）',
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start_time datetime not null comment '会议开始时间',
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end_time datetime not null comment '会议结束时间',
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create_time datetime default CURRENT_TIMESTAMP null comment '创建时间',
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update_time datetime default CURRENT_TIMESTAMP null on update CURRENT_TIMESTAMP comment '更新时间'
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)
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comment '会议主表' charset = utf8mb4;
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create table meeting_speaker
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(
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id int auto_increment comment '嘉宾ID（主键）'
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primary key,
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meeting_id int not null comment '关联会议ID（外键，对应meeting表id）',
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name varchar(100) not null comment '嘉宾姓名',
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title varchar(200) default '' null comment '嘉宾头衔（如：XX公司技术总监）',
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avatar varchar(512) default '' null comment '嘉宾头像URL',
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intro text null comment '嘉宾简介',
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sort int default 0 null comment '嘉宾排序（数字越小越靠前）',
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constraint fk_meeting_speaker_meeting
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foreign key (meeting_id) references meeting (id)
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on delete cascade
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)
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comment '会议演讲嘉宾表' charset = utf8mb4;
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create index idx_meeting_id
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on meeting_speaker (meeting_id)
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comment '索引：优化按会议查询嘉宾';
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create table teaching_case
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(
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id int auto_increment comment '案例ID（主键）'
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primary key,
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title varchar(255) not null comment '案例标题',
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tutor_name varchar(100) not null comment '导师姓名',
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tutor_title varchar(200) default '' null comment '导师头衔（如：XX讲师）',
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student_names varchar(500) not null comment '学生姓名（多人用逗号分隔，如“张三,李四”）',
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content text not null comment '案例内容（详细描述）',
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cover_url varchar(512) default '' null comment '案例封面图URL',
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sort int default 0 null comment '排序（数字越小越靠前）',
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create_time datetime default CURRENT_TIMESTAMP null comment '创建时间',
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update_time datetime default CURRENT_TIMESTAMP null on update CURRENT_TIMESTAMP comment '更新时间'
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)
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comment '独立教学案例表' charset = utf8mb4;
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create table video_case
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(
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id int auto_increment comment '视频案例ID（主键）'
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primary key,
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title varchar(255) not null comment '视频案例标题',
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intro text null comment '视频简介（描述案例背景、内容等）',
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video_url varchar(512) not null comment '视频播放地址（如MP4 URL、视频平台嵌入链接）',
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duration int default 0 null comment '视频时长（秒，可选，用于前端展示）',
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designer_names varchar(1000) not null comment '设计人员名单（多人用逗号分隔，如“张三,李四,王五”）',
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tutor_names varchar(1000) not null comment '指导老师名单（多人用逗号分隔，如“赵六,钱七”）',
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sort int default 0 null comment '排序（数字越小越靠前）',
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create_time datetime default CURRENT_TIMESTAMP null comment '创建时间',
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update_time datetime default CURRENT_TIMESTAMP null on update CURRENT_TIMESTAMP comment '更新时间'
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)
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comment '视频案例表（独立存储，不关联其他表）' charset = utf8mb4;
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