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

4 votes308 views4 answers
Start mysql
SQL
0 vote284 views1 answer
Jooq replace
SQL
1 vote315 views1 answer
Pl sql create table from another table
SQL
1 vote285 views1 answer
Postgres format date in select
SQL
0 vote278 views1 answer
Como verificar registros duplicados no sql postgresql
SQL
1 vote287 views1 answer
Sqlite3 read only
SQL
0 vote286 views1 answer
Aktor yang pernah terlibat lebih dari 3 film di sql
SQL
0 vote311 views1 answer
Postgresql create table many-to-many
SQL
0 vote326 views1 answer
User has exceeded the 'max_questions' resource (current value: 75000)
SQL
0 vote287 views1 answer
Mysql add to value
SQL