sql make sure every user is unqiuew

chfle answered on October 26, 2020 Popularity 5/10 Helpfulness 4/10

answer sql make sure every user is unqiuew

sql make sure every user is unqiuew

Comment

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)
);

Popularity 5/10 Helpfulness 4/10 Language sql

Source: stackoverflow.com

Tags: sql

Link to this answer
Share Copy Link