mysql drop foreign key constraint code example

Example 1: mysql remove foreign key constraint

ALTER TABLE jobs DROP FOREIGN KEY constraint_name

Example 2: 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);

Example 3: mysql drop key

ALTER TABLE tbl_quiz_attempt_master
  DROP INDEX `PRIMARY`;

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