how to calculate of sum of multiple conditional values in mysql - mysql

Question

I'm trying to get sums of conditional values and group by minute.
I succeeded with the following query but results takes some time and wonder is there any efficient way?
SELECT x.query, x.value, x.time FROM (
SELECT id, query, SUM(VALUE) AS value, time FROM `modbuslogs` WHERE query IN ("sensor1","sensor2") AND time LIKE '2020-12-04%' GROUP BY HOUR(time), MINUTE(TIME)
UNION
SELECT id, query, SUM(VALUE) AS value, time FROM `modbuslogs` WHERE query IN ("sensor3","sensor4") AND time LIKE '2020-12-04%' GROUP BY HOUR(time), MINUTE(TIME)
) x
GROUP BY x.query, HOUR(time), MINUTE(TIME)
ORDER BY x.id
Table structure:
+--------+-------+-----------------+
| query | value | time |
+--------+-------+-----------------+
|sensor1 | 2 |2012-02-10 00:00 |
|sensor2 | 2 |2012-02-10 00:00 |
|sensor3 | 3 |2012-02-10 00:00 |
|sensor4 | 3 |2012-02-10 00:00 |
|sensor1 | 2 |2012-02-10 00:01 |
|sensor2 | 3 |2012-02-10 00:01 |
|sensor3 | 3 |2012-02-10 00:01 |
|sensor4 | 2 |2012-02-10 00:01 |
+--------+-------+-----------------+
Obtained and expected Output:
+--------+-------+-----------------+
| query | value | time |
+--------+-------+-----------------+
|sensor1 | 4 |2012-02-10 00:00 |
|sensor3 | 6 |2012-02-10 00:00 |
|sensor1 | 5 |2012-02-10 00:01 |
|sensor3 | 5 |2012-02-10 00:01 |
+--------+-------+-----------------+

Answer 1

There is no point for the union subquery in the first place. This is equivalent to your query:
select id, query, sum(value) as value, min(time) as time
from modbuslogs
where
query in ('sensor1', 'sensor2', 'sensor3', 'sensor4')
and time >= '2020-12-04'
and time < '2020-12-05'
group by query, hour(time), minute(time)
This gives one row per query and per minute, with the sum of value. Not that we need an aggregate function around time, so the select clause is consistent with the group by clause. Also, the where clause uses date filtering rather than string matching.
On the other hand, if you want the two groups of sensors in two different columns, then use conditional aggrgation:
select id, min(time) as time,
sum(case when query in ('sensor1', 'sensor2') then value else 0 end) as value_1_2,
sum(case when query in ('sensor3', 'sensor4') then value else 0 end) as value_3_4
from modbuslogs
where
query in ('sensor1', 'sensor2', 'sensor3', 'sensor4')
and time >= '2020-12-04'
and time < '2020-12-05'
group by hour(time), minute(time)