Answers for "how to add a foreign key to an existing table in mysql"

SQL
6

alter table add foreign key mysql

ALTER TABLE orders
ADD 
FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE;
Posted by: Guest on May-29-2020
3

fk in insert mysql

INSERT INTO joke(joke_text, joke_date, author_id)
VALUES (‘Humpty Dumpty had a great fall.’, ‘1899–03–13’, 
        (SELECT id FROM author WHERE author_name = ‘Famous Anthony’));
Posted by: Guest on November-17-2020
1

mysql alter add foreign key

ALTER TABLE ordenes ADD ticket VARCHAR(50) NOT NULL;
ALTER TABLE ordenes ADD CONSTRAINT fk_ticket FOREIGN KEY (ticket) REFERENCES tickets(ticket);
Posted by: Guest on October-19-2020
0

create table mysql with foreign key

CREATE TABLE Orders (
    OrderID int NOT NULL,
    OrderNumber int NOT NULL,
    PersonID int,
    PRIMARY KEY (OrderID),
    FOREIGN KEY (PersonID) REFERENCES Persons(PersonID)
);
Posted by: Guest on November-03-2020

Code answers related to "how to add a foreign key to an existing table in mysql"

Code answers related to "SQL"

Browse Popular Code Answers by Language