text: -- ---- drop ----
  DROP TABLE IF EXISTS `Sellers`;
  
  -- ---- create ----
  CREATE TABLE `Sellers` (
      `id` BIGINT NOT NULL AUTO_INCREMENT ,
      `password` VARCHAR(16) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL ,
      `price` INT NOT NULL ,
      `created_at` TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP ,
      `expired_at` TIMESTAMP NULL DEFAULT NULL ,
      PRIMARY KEY (`id`, `password`),
      KEY created_at_expired_at(`created_at`, `expired_at`)
  ) ENGINE = InnoDB;