MySql更新过程错误

Question

我的更新查询有问题。我需要让它发挥作用:P

该过程选择所有重复的记录(需要重新创建以选择和更新值)

DELIMITER $$
USE `bgw_r`$$
DROP PROCEDURE IF EXISTS `tpl_pobierz_dodane`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `tpl_pobierz_dodane`(puzytkownik VARCHAR(50), psesja VARCHAR(50))
BEGIN
SELECT a.`id` AS idd FROM `paliwa_temp` AS a INNER JOIN `paliwo_fv` AS b 
ON (a.`numerRejestracyjny` = b.`numer_rejestracyjny`)
WHERE a.`sesja` = psesja AND b.`data_tankowania` = a.`dataTankowania` AND a.`iloscPaliwa` = b.`wydano_litry`; # GROUP BY id
END$$
DELIMITER ;

或创建其他更新该值的过程:

DELIMITER $$
USE `bgw_r`$$
DROP PROCEDURE IF EXISTS `tpl_ustaw_jako_duplikaty`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `tpl_ustaw_jako_duplikaty`(puzytkownik VARCHAR(50), psesja VARCHAR(50))
BEGIN
UPDATE a
    SET a.`duplikat` = "true"
    FROM `paliwa_temp` AS a
    INNER JOIN `paliwo_fv` AS b
    ON( b.`numer_rejestracyjny` = a.`numerRejestracyjny`)
    WHERE a.`sesja` = psesja AND b.`data_tankowania` = a.`dataTankowania` AND a.`iloscPaliwa` = b.`wydano_litry`;
END$$
DELIMITER ;

更新查询时出错:错误代码:1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM `paliwa_temp` as a
    INNER JOIN `paliwo_fv` as b
    on( b.`numer_rejestracyjny' at line 5

不知道为什么:/

Answer 1

正确的连接更新语句应该是

update paliwa_temp a
INNER JOIN `paliwo_fv` AS b
ON( b.`numer_rejestracyjny` = a.`numerRejestracyjny`)
SET a.`duplikat` = "true"
WHERE a.`sesja` = psesja 
AND b.`data_tankowania` = a.`dataTankowania` 
AND a.`iloscPaliwa` = b.`wydano_lit