text: -- 05/08/2019 - Creating product components table
  CREATE TABLE `product_components` (
    `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
    `product_id` int(11) unsigned NOT NULL,
    `item_id` int(11) unsigned NOT NULL,
    `amount` decimal(8,2) NOT NULL DEFAULT '0',
    `created_dtm` DATETIME NOT NULL,
    `modified_dtm` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (`id`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;