drop foreign key
ALTER TABLE table_name
DROP CONSTRAINT fk_name;drop foreign key
ALTER TABLE table_name
DROP CONSTRAINT fk_name;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);how to set foreign key in sql server
CREATE TABLE Orders (
OrderID int NOT NULL,
OrderNumber int NOT NULL,
PersonID int,
PRIMARY KEY (OrderID),
FOREIGN KEY (PersonID) REFERENCES Persons(PersonID)
);Copyright © 2021 Codeinu
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