Error: Every derived table must have its own alias
Error No: 1248
SELECT DISTINCT *, `p`.`price`, `ps`.`price` as `special`, (SELECT (CASE WHEN `pd2`.`type` = 'P' THEN (`pd2`.`price` * (`p`.`price` / 100)) WHEN `pd2`.`type` = 'S' THEN (`p`.`price` - `pd2`.`price`) ELSE `pd2`.`price` END) FROM `product_discount` `pd2` WHERE `pd2`.`product_id` = `p`.`product_id` AND `pd2`.`customer_group_id` = '1' AND `pd2`.`quantity` = '1' AND `pd2`.`special` = '0' AND ((`pd2`.`date_start` = '0000-00-00' OR `pd2`.`date_start` < NOW()) AND (`pd2`.`date_end` = '0000-00-00' OR `pd2`.`date_end` > NOW())) ORDER BY `pd2`.`priority` ASC, `pd2`.`price` ASC LIMIT 1) AS `discount`, (SELECT `pr`.`points` FROM `product_reward` `pr` WHERE `pr`.`product_id` = `p`.`product_id` AND `pr`.`customer_group_id` = '1') AS `reward`, (SELECT COUNT(*) FROM `review` `r` WHERE `r`.`product_id` = `p`.`product_id` AND `r`.`status` = '1' GROUP BY `r`.`product_id`) AS `reviews` FROM (SELECT * FROM `product_discount` `ps` LEFT JOIN `product_to_store` `p2s` ON (`ps`.`product_id` = `p2s`.`product_id`) LEFT JOIN `product` `p` ON (`p2s`.`product_id` = `p`.`product_id`) LEFT JOIN `product_description` `pd` ON (`p`.`product_id` = `pd`.`product_id`) WHERE `p2s`.`store_id` = '0' AND `pd`.`language_id` = '1' AND `p`.`status` = '1' AND `p`.`date_available` <= NOW() AND `ps`.`quantity` = '1' AND `ps`.`special` = '1' AND `ps`.`customer_group_id` = '1' AND ((`ps`.`date_start` = '0000-00-00' OR `ps`.`date_start` < NOW()) AND (`ps`.`date_end` = '0000-00-00' OR `ps`.`date_end` > NOW())) ORDER BY `ps`.`priority` ASC LIMIT 1): in /var/www/opencart/upload/system/library/db/mysqli.php on line 122