I am not able to drop a FOREIGN KEY in MYSQL, problem with the syntax

Question

CREATE TABLE employee (
emp_id SMALLINT PRIMARY KEY,
first_name VARCHAR(10),
last_name VARCHAR(10),
birthdate DATE,
sex VARCHAR(1),
salary SMALLINT,
super_id SMALLINT,
branch_id SMALLINT
);

ALTER TABLE employee
ADD FOREIGN KEY (super_id) REFERENCES employee(emp_id);

ALTER TABLE employee
ADD FOREIGN KEY (branch_id) REFERENCES branch(branch_id);

ALTER TABLE employee
DROP FOREIGN KEY (super_id);

I am not able to drop the foreign key after adding it. Trying to learn SQL, thank you for the answers.

ERROR - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(super_id)' at line 2

Answer 1

Give your constraint a name:

ALTER TABLE employee
ADD CONSTRAINT fk_employee_superid__employee_employeeid 
FOREIGN KEY (super_id) REFERENCES employee(emp_id);

Drop it by name:

ALTER TABLE employee
DROP CONSTRAINT fk_employee_superid__employee_employeeid;