Unable to drop foreign key in SQL server

Question

I am trying this query to drop a foreign key ALTER TABLE dbo.[User] DROP FOREIGN KEY FK_User_UserTypeID .

But I am getting this

Msg 156, Level 15, State 1, Line 1 Incorrect syntax near the keyword 'FOREIGN'.

Answer 1

SQL FOREIGN KEY on CREATE TABLE: -

CREATE TABLE Orders (
    OrderID int NOT NULL PRIMARY KEY,
    OrderNumber int NOT NULL,
    PersonID int FOREIGN KEY REFERENCES Persons(PersonID)
);

SQL FOREIGN KEY on ALTER TABLE:-

ALTER TABLE Orders
ADD CONSTRAINT FK_PersonOrder
FOREIGN KEY (PersonID) REFERENCES Persons(PersonID);

DROP a FOREIGN KEY Constraint:-

ALTER TABLE Orders
DROP CONSTRAINT FK_PersonOrder;

NOTE Should not have any dependency on foreign key while dropping key constraints, otherwise you will not be able to drop the constraint.