drop foreign key
ALTER TABLE table_name DROP CONSTRAINT fk_name;
drop foreign key
ALTER TABLE table_name DROP CONSTRAINT fk_name;
mysql add foreign key
-- On Create CREATE TABLE tableName ( ID INT, SomeEntityID INT, PRIMARY KEY (ID), FOREIGN KEY (SomeEntityID) REFERENCES SomeEntityTable(ID) ON DELETE CASCADE ); -- On Alter, if the column already exists but has no FK ALTER TABLE tableName ADD FOREIGN KEY (SomeEntityID) REFERENCES SomeEntityTable(ID) ON DELETE CASCADE; -- Add FK with a specific name -- On Alter, if the column already exists but has no FK ALTER TABLE tableName ADD CONSTRAINT fk_name FOREIGN KEY (SomeEntityID) REFERENCES SomeEntityTable(ID) ON DELETE CASCADE;
drop foreign key
ALTER TABLEEmployee DROP FOREIGN KEY FK_EmployeeDept;
how to remove foreign key constraint in sql
USE AdventureWorks2012; GO ALTER TABLE dbo.DocExe DROP CONSTRAINT FK_Column_B; GO
Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us