Answers for "on delete cascade sql meaning"

1

sql cascade delete sql

ALTER TABLE dbo.T2
   DROP CONSTRAINT FK_T1_T2   -- or whatever it's called

ALTER TABLE dbo.T2
   ADD CONSTRAINT FK_T1_T2_Cascade
   FOREIGN KEY (EmployeeID) REFERENCES dbo.T1(EmployeeID) ON DELETE CASCADE
Posted by: Guest on May-26-2021
0

cascade delete on update

CREATE TABLE child (
        id INT, 
        parent_id INT,
        INDEX par_ind (parent_id),
        FOREIGN KEY (parent_id) 
            REFERENCES parent(id)
            ON UPDATE CASCADE ON DELETE CASCADE
    ) ENGINE=INNODB;
Posted by: Guest on July-27-2021

Browse Popular Code Answers by Language