/SQL/Create column that already exists mysql

Create column that already exists mysql

DROP PROCEDURE IF EXISTS `?`;
DELIMITER //
CREATE PROCEDURE `?`()
BEGIN
  DECLARE CONTINUE HANDLER FOR SQLEXCEPTION BEGIN END;
  ALTER TABLE `table_name` ADD COLUMN `column_name` INTEGER;
END //
DELIMITER ;
CALL `?`();
DROP PROCEDURE `?`;

Source: stackoverflow.com

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