MySQL 建表語句（參考）

該建表sql語句在日常學習，工作中用於參考使用

CREATE TABLE classes(
    id int auto_increment primary key,
    classname char(30) not null
)engine=innodb charset=utf8;

CREATE TABLE students(
    id int auto_increment primary key,
    name char(24) not null,
    class_id int ,
    unique uq1 (name,class_id),
    constraint fk_students_classes foreign key ('class_id') refernces classes('id')
)engine=innodb charset=utf8;

CREATE TABLE teacher (
    id int auto_increment primary key,
    name char(24) not null
)engine=innodb charset=utf8;

CREATE TABLE teacher2class(
    id int  auto_increment primary key,
    t_id int not null,    
    c_id int not null,
    constraint `fk_student` foreign key (`t_id`) peferences `teacher`(`id`),
    constraint `fk_class` foreign key (`c_id`) peferences `classes`(`id`)
)engine=innodb charset=utf8;

CREATE TABLE students (
    id int auto_increment primary key,
    name varchar(32),
    class_id int not null,
    constraint fk_user_depar foreign key (`class_id`) refernces classes(`id`)
)engine=innodb default charset=utf8;

CREATE TABLE department (
    id bigint auto_increment primary key,
    title char(15)
)engine=innodb default charset=utf8;

CREATE TABLE user_info(
    id int auto_increment primary key,
    username varchar(30) not null ,    
    password varchar(30) not null
)engine=innodb default charset=utf8;