MySQL-21.多表设计-案例-关系分析-表结构

一.参考页面原型及需求，设计合理的表结构

二.创建category表 

create table catagory
(
    id          int unsigned auto_increment comment '主键ID'
        primary key,
    name        varchar(20)      not null comment '分类名称',
    type        tinyint unsigned not null comment '类型：1.菜品分类，2.tao''cuo',
    sort        tinyint unsigned not null comment '排序字段',
    status      tinyint unsigned not null comment '状态字段：0.停用。1.启用',
    create_time datetime         not null comment '创建时间',
    update_time datetime         not null comment '更新时间',
    constraint catagory_pk2
        unique (name)
)
    comment '分类表';

三.创建dish表

create table dish
(
    id          int unsigned auto_increment
        primary key,
    name        varchar(20)                  not null comment '菜品名称',
    category_id int unsigned                 not null,
    price       decimal(8, 2)                not null,
    image       varchar(300)                 not null comment '图片url',
    description varchar(200)                 null comment '描述信息',
    stutus      tinyint unsigned default '0' not null comment '状态.0:停售，1:起售',
    create_time datetime                     not null comment '创建时间',
    update_time datetime                     not null comment '修改时间',
    constraint dish_pk2
        unique (name)
)
    comment '菜品表';

 三.套餐表-setmeal

create table setmeal
(
    id          int unsigned auto_increment comment '主键ID'
        primary key,
    name        varchar(20)                  not null comment '套餐名称',
    category_id int unsigned                 not null comment '套餐分类ID',
    price       decimal(8, 2)                not null comment '价格',
    image       varchar(300)                 not null comment '图片url',
    description varchar(200)                 null comment '描述信息',
    status      tinyint unsigned default '0' not null comment '状态，0：停售，1：起售',
    create_time datetime                     not null comment '创建时间',
    update_time datetime                     not null comment '修改时间',
    constraint setmeal_pk2
        unique (name)
)
    comment '套餐表';

四.套餐菜品关系表        setmeal_dish

create table setmeal_dish
(
    id         int unsigned auto_increment comment '主键id',
    setmeal_id int unsigned     not null comment '套餐id',
    dish_id    int unsigned     not null comment '菜品ID',
    copies     tinyint unsigned not null comment '菜品的份数',
    constraint setmeal_dish_pk
        primary key (id)
)
    comment '套餐菜品关系表';

总结