ALTER TABLE `Carrier`
  ADD COLUMN `trackingRegex` VARCHAR(50) NULL AFTER `isActive`,
  ADD COLUMN `url` VARCHAR(50) NULL AFTER `trackingRegex`;

INSERT INTO Carrier (name, trackingRegex, url, isActive) VALUES ('Bartolini', '[\\w]{12}', 'http://www.brt.it', 1);
INSERT INTO Carrier (name, trackingRegex, url, isActive) VALUES ('Gls-italy', null, 'https://www.gls-italy.com/', 1);