sql make sure every user is unqiuew
create table user(
user_id INT auto_increment PRIMARY KEY,
username varchar(50) not null,
avator varchar(50),
gender boolean not null,
phone varchar(20),
unique(username)
);
create table journey(
id INT auto_increment PRIMARY KEY,
start varchar(100) not null,
dest varchar(100) not null,
time date not null,
person INT,
user_id INT not null,
foreign key(user_id) references user(user_id)
);
Are there any code examples left?
New code examples in category SQL
-
SQL 2022-03-27 22:45:25 how to get mysql on ubuntu
-
SQL 2022-03-27 20:00:47 install latest mysql on debian 9
-
SQL 2022-03-27 19:45:11 sql '=' cannot be applied to date varchar(10) athena
-
SQL 2022-03-27 19:20:41 sql is not null
-
SQL 2022-03-27 19:20:39 sql group by error
-
SQL 2022-03-27 18:35:10 replace null with 0 in sql
-
SQL 2022-03-27 17:30:32 concat column value of same user in mysql
-
SQL 2022-03-27 17:05:02 sql developer sql worksheet not showing
-
SQL 2022-03-27 16:45:07 kill a pid redshift
-
SQL 2022-03-27 16:00:09 joins in sql server