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

8 votes148 views3 answers
Mysql alter table add index
SQL
1 vote213 views1 answer
Connect to mysql database ubuntu
SQL
0 vote155 views1 answer
Python list from sql
SQL
5 votes154 views3 answers
Postgres show databases
SQL
2 votes141 views1 answer
Codeigniter print last sql query
SQL
0 vote259 views1 answer
Drop check command
SQL
1 vote167 views2 answers
Rebuild index sql server
SQL
0 vote148 views1 answer
Replace multiple string in query sql
SQL
2 votes179 views1 answer
How to get non distinct values in sql
SQL
0 vote139 views1 answer
Output to file mysql
SQL