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

1 vote162 views2 answers
Mysql show views
SQL
4 votes1.1K views2 answers
Host '192.168.43.100' is not allowed to connect to this MySQL server
SQL
0 vote238 views2 answers
How to take recent row without limit in mysql
SQL
0 vote166 views1 answer
Como saber si tengo mysql instalado
SQL
0 vote217 views1 answer
Capabilities of sql select statements
SQL
2 votes171 views3 answers
Mysql pass command from command line
SQL
1 vote183 views1 answer
Mysql average of multiple columns
SQL
2 votes175 views1 answer
SQLSTATE[HY000] [1049] Unknown database
SQL
0 vote9.7K views1 answer
Postgresql delete type
SQL
1 vote203 views1 answer
Mysql default port
SQL