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 vote267 views4 answers
Alter schema sql
SQL
0 vote303 views1 answer
Stored procedure to change name of column for all dependent tables and views
SQL
3 votes263 views2 answers
Get current year sql
SQL
0 vote249 views1 answer
Create table Statement Syntax in SQL Server
SQL
0 vote269 views1 answer
Ubuntu connect to mssql database
SQL
1 vote266 views1 answer
Sql server 2012 query history
SQL
3 votes256 views1 answer
Oracle list invalid password ORA-01017
SQL
0 vote300 views1 answer
For row in sql database python loop
SQL
0 vote270 views1 answer
Pgsql is not permitted to log in
SQL
0 vote268 views1 answer
Search In the Database using Text
SQL