mysql - 语法错误 User_id 在表帮助中找不到!

Question

由于语法错误，Sql 不允许我创建这些表，有人可以帮助我。

drop table users;
drop table intrest;
drop table friendships;

create table users(
id INT,
Fname char(15),
Lname char(15),
email char(20),
street char(15),
state char(2),
zip INT,
age INT,
gender char (2),
phone INT,
User_password char(15),
primary key (id),
foreign key (intrest_id) references intrest(id)
);

create table Intrests(
id INT,
description char(30),
Primary key (id),
foreign key (users_id) references users(id)
);

create table User_intrest(
foreign key (users_id) references users(id),
foreign key (intrest_id) references intrest(id)
);


create table friendships(
User_1_id INT,
User_2_id INT,
description Char(20),
foreign key (users_id) references users(id)
);

Answer 1

create table Intrests( id INT, description char(30), 
                       Primary key (id), 
                       foreign key (users_id) references users(id) );

create table User_intrest( foreign key (users_id) references users(id), 
                           foreign key (intrest_id) references intrest(id) );

对于兴趣表，users_id 列在哪里定义？ user_interest 表的列定义？