Thanks in advance.

SELECT
`billing_data`.`start_gmt_datetime` AS `start_gmt_datetime`,
MONTHNAME(start_gmt_datetime) AS `month`,
YEAR(start_gmt_datetime) AS `year`,
sum(kwh_used) AS `month_total`
FROM `billing_data`
WHERE `member_account_no` = 'SE0033284'
GROUP BY `month`, `year`
ORDER BY `start_gmt_datetime` ASC