text: CREATE TABLE `language_data_characteristics_content_types`
  (
      characteristic_id int UNSIGNED NOT NULL,
      content_type_id   int          NOT NULL,
      UNIQUE KEY `language_data_characteristics_content_types_unique` (characteristic_id, content_type_id),
      CONSTRAINT `characteristics_content_types_id_fk` FOREIGN KEY (content_type_id) REFERENCES `content_types` (`id`),
      CONSTRAINT `characteristics_content_types_characteristics_id_fk` FOREIGN KEY (characteristic_id) REFERENCES `language_data_characteristics` (`id`)
  ) ENGINE = InnoDB
    DEFAULT CHARSET = utf8mb4
    COLLATE = utf8mb4_unicode_ci;
  