我正在尝试在 phpmyadmin mysql 上使用不同的 where 语句加入两个查询，以下是我需要帮助的代码：
SELECT elec.`Property ID`, elec.`Year`, elec.`Month`, elec.`Electric Consumption`, gas.`Gas Consumption`
FROM
(
SELECT `Property ID`, `Year`, `Month`, `Year_ref`, Sum(`Electric Consumption`) AS 'Electric Consumption', Sum(`Electric Cost`) AS 'Electric Cost'
FROM utility_use
WHERE `Electric Cost` > 0
GROUP BY `Property ID`, `Year`, `Month`, `Year_ref`
HAVING `Property ID`= 4
ORDER BY `Year`, `Month`;
) as elec
INNER JOIN
(
SELECT `Property ID`, `Year`, `Month`, `Year_ref`, `Gas Consumption` AS 'Gas Consumption', Sum(`Gas Cost`) AS 'Gas Cost'
FROM utility_use
WHERE `Gas Cost`> 0
GROUP BY `Property ID`, `Year`, `Month`, `Year_ref`
HAVING `Property ID`= 4
ORDER BY `Year`, `Month`;
) as gas
ON (elec.`Year` = gas.`Year`) AND (elec.`Month` = gas.`Month`) AND (elec.`Property ID` = gas.`Property ID`)
GROUP BY elec.`Property ID`, elec.`Year`, elec.`Month`, elec.`Electric Consumption`, gas.`Gas Consumption`
ORDER BY elec.`Year`, elec.`Month`;
它给了我一个语法错误，我似乎无法弄清楚请帮忙。