GROUPed or used in an aggregate function error - mysql

Question

I want to Group By CUSTOM_DRIVER in the query because I am getting over 1.3 million results and I just need to view them by Custom Driver for the month by store.
The query is returning me
I want something like this
I've tried using Distinct and Group By but I keep getting the error:
Attribute A.STORE_NUM must be GROUPed or used in an aggregate function
How do I get around this? The code I've been using is:
SELECT *
FROM(
SELECT
SE.STORE_NUM,
DM.MONTH_NAME_445 AS MO_445,
--DM.WEEK_START_DT_MON AS WK_BEGIN_MONDAY,
--SE.METRIC_DATE,
substring(SE.ROLLUP_NAME, 39, 20) as CUSTOM_DRIVER,
SE.DT_IMPORTED,
SE.METRIC_VALUE
FROM DNA_PUBLIC.ADMIN.SCHEDULE_EFFECTIVENESS SE
JOIN DNA_PUBLIC.ADMIN.DAY_MAP DM ON SE.METRIC_DATE = DM.DATE_DT
JOIN (
SELECT DISTINCT
METRIC_DATE,
MAX(DATE(DT_IMPORTED)) AS MAX_DT
FROM DNA_PUBLIC.ADMIN.SCHEDULE_EFFECTIVENESS
GROUP BY 1
) MX ON SE.METRIC_DATE = MX.METRIC_DATE
WHERE METRIC_NAME = 'Coverage Effectiveness'
AND SE.ROLLUP_NAME LIKE 'O%'
AND SE.METRIC_DATE between '07/27/2020' and '11/11/2020'
AND CAST(SE.DT_IMPORTED AS DATE) = MAX_DT
--AND CUSTOM_DRIVER = 'Truck/Truck'
AND SE.INDICATOR_NAME = 'Required'
--and STORE_NUM = 1
) AS A
Order by STORE_NUM

Answer 1

A work around was to select the values and group by the order of the selected variables. Thanks for the all the input!
SELECT
STORE_NUM,
MO_445,
CUSTOM_DRIVER,
SUM(METRIC_VALUE) as Tot_Hrs
FROM(
SELECT
SE.STORE_NUM,
DM.MONTH_NAME_445 AS MO_445,
DM.WEEK_START_DT_MON AS WK_BEGIN_MONDAY,
SE.METRIC_DATE,
substring(SE.ROLLUP_NAME, 39, 20) as CUSTOM_DRIVER,
SE.DT_IMPORTED,
SE.METRIC_VALUE
FROM DNA_PUBLIC.ADMIN.SCHEDULE_EFFECTIVENESS SE
JOIN DNA_PUBLIC.ADMIN.DAY_MAP DM ON SE.METRIC_DATE = DM.DATE_DT
JOIN (
SELECT DISTINCT
METRIC_DATE,
MAX(DATE(DT_IMPORTED)) AS MAX_DT
FROM DNA_PUBLIC.ADMIN.SCHEDULE_EFFECTIVENESS
GROUP BY 1
) MX ON SE.METRIC_DATE = MX.METRIC_DATE
WHERE METRIC_NAME = 'Coverage Effectiveness'
AND SE.ROLLUP_NAME LIKE 'O%'
AND SE.METRIC_DATE between '07/27/2020' and '11/11/2020'
AND CAST(SE.DT_IMPORTED AS DATE) = MAX_DT
--AND CUSTOM_DRIVER = 'Truck/Truck'
AND SE.INDICATOR_NAME = 'Required'
and STORE_NUM = 1
) AS A
group by 1,2,3
Order by STORE_NUM