Getting category based on production shift - sql

Question

I have this query
with cte as(
SELECT *,
ROW_NUMBER() OVER (PARTITION BY seq ORDER BY date_time) rn1,
ROW_NUMBER() OVER (PARTITION BY seq, output > 0
ORDER BY date_time) rn2
FROM myTable
;
select
seq,
date_time::date,
MIN(date_time) AS MinDatetime,
MAX(date_time) AS MaxDatetime,
SUM(output) AS sum_output
FROM cte cte
GROUP by
seq,
date_time::date ,
cntpr > 0,
rn1 - rn2
ORDER BY
seq,
MIN(date_time);
here's the result:
what I would like to do is to join my result to this master table
enter image description here
and the expected result will be MinDatetime and MaxDatetime among my master table's start and end shift to show the shift information, like this:
enter image description here
Any help would be very appreciated.. thank you!

Answer 1

This is the solution I came up with:
select seq, shift, start_shift, end_shift, MinDateTime, MaxDateTime
from
(
select
seq,
MIN(date_time) AS MinDatetime,
MAX(date_time) AS MaxDatetime,
SUM(output) AS sum_output
FROM cte cte
GROUP by
seq
ORDER BY
seq,
MIN(date_time::date)) t
join mstr
on
CASE
WHEN start_shift < end_shift THEN (MinDateTime::time between start_shift and end_shift) OR (MaxDateTime::time between start_shift and end_shift)
ELSE (MinDateTime::time >= start_shift) OR
(MaxDateTime::time >= start_shift) OR
(MinDateTime::time <= end_shift) OR
(MaxDateTime::time <= end_shift)
END
ORDER BY seq;
Fiddle: https://www.db-fiddle.com/f/4jyoMCicNSZpjMt4jFYoz5/4208
Explanation: I get the groups, join them with master table on interval matching.