Mariadb add foreign key

alter table group_a 
add constraint fk_b_in_a
foreign key(`b_id`) 
    references group_b(`b_id`)
    on delete set null
    on update set null;

Source: mariadbtutorial.com

Create table in mysql mariadb primary key foreign key

CREATE TABLE IF NOT EXISTS `scores` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  UserId int(11) NOT NULL,
  `NICKNAME` varchar(50) NOT NULL,
  `HIGHSCORE` int(11) NOT NULL,
  PRIMARY KEY (`ID`),
  FOREIGN KEY (UserId) REFERENCES USER(Id)
);

Source: stackoverflow.com

Alter table add foreign key mariadb example

alter table caixa add foreign key (idcaixafluxo) references caixafluxo (idcaixafluxo);

Similar codes

0 vote193 views1 answer
Excute raw query
SQL
0 vote207 views1 answer
Get rows from 1 table with other table empty mysql
SQL
3 votes206 views3 answers
Django.db.utils.OperationalError: no such table:
SQL
0 vote195 views3 answers
Sql all columns
SQL
1 vote264 views1 answer
Postgresql Insufficient privilege: 7 ERROR: permission denied for table
SQL
3 votes201 views1 answer
Make a field auto_increment mysql
SQL
0 vote229 views1 answer
Reindex mssql table
SQL
0 vote210 views1 answer
Sql query for select from specific columns in a table
SQL
0 vote204 views1 answer
Postgres 11 add primary key
SQL
3 votes268 views1 answer
Query less than datetime sql
SQL