Markdium-Node.js MySQL Transaction: a step-by-step tutorial with a real-life example

Markdium-PLSQL.sql

CREATE TABLE `product` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `sku` char(6) COLLATE utf8_unicode_ci NOT NULL,
  `price` int(11) NOT NULL COMMENT 'in cents',
  `quantity` int(11) NOT NULL,
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE INDEX `sku` (`sku` ASC) VISIBLE
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

CREATE TABLE `sales_order` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `items` text COLLATE utf8_unicode_ci NOT NULL,
  `total` int(11) NOT NULL,
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;