Further group by WEEK NUMBER in sub-query - sql

Question

I am trying to subtract values from 2 columns and group them week number.
The event code column has values 3,4. I am trying to sum duration for event codes 4 and subtract the duration of event code 3. These values need to be derived for the last 12 weeks.
Here is what I have so far. I am stuff and further grouping by week number:
SELECT DISTINCT CUSTOMER_ID,
((SELECT SUM(DURATION_IN_SECONDS)/60 FROM TABLE1 ee WHERE ee.CUSTOMER_ID = e.CUSTOMER_ID AND EVENT_CODE IN (4))-
(SELECT SUM(DURATION_IN_SECONDS)/60 FROM TABLE1 ee WHERE ee.CUSTOMER_ID = e.CUSTOMER_ID AND EVENT_CODE IN (3))) AS UNPRODUCTIVE_MINUTES
FROM TABLE1 e
WHERE TIMEDATE >= TO_DATE('01-OCT-19','DD-MON-YY')
AND TIMEDATE <= TO_DATE('31-DEC-19','DD-MON-YY')
GROUP BY CUSTOMER_ID
The above query produces results like this:
CUSTOMER_ID UNPRODUCTIVE_MINUTES
A100 1601
But my result has to be like this:
CUSTOMER_ID WEEKNUMBER UNPRODUCTIVE_MINUTES
A100 12 171
A100 11 108
A100 10 112
A100 9 110
A100 8 98
A100 7 67
A100 6 117
A100 5 100
A100 4 111
A100 3 77
A100 2 73
A100 1 87

Answer 1

I am not sure, how you want to calculate the week number but I guess weeknumber is (timedate - start timedate / 7) + 1 so creating the query accordingly.
Select customer_id,
Sum(case when EVENT_CODE = 4 then DURATION_IN_SECONDS else (-1* DURATION_IN_SECONDS) end)/60 as dur,
Floor(Trunc(timedate) - TO_DATE('01-OCT-19','DD-MON-YY') / 7) + 1 as weeknumber
From table1 e
Where TIMEDATE >= TO_DATE('01-OCT-19','DD-MON-YY')
AND TIMEDATE <= TO_DATE('31-DEC-19','DD-MON-YY')
AND EVENT_CODE in (3, 4)
GROUP BY CUSTOMER_ID, floor(trunc(timedate) - TO_DATE('01-OCT-19','DD-MON-YY') / 7) + 1
Here, I have not used event_code 3 as DURATION_IN_SECONDS for event_code 3 and 4 both minus DURATION_IN_SECONDS for 3 will eventually same as DURATION_IN_SECONDS for event_code 4 alone.
Cheers!!

Answer 2

TO_CHAR(TIMEDATE, 'ww') function might directly be used to
determine the week number
No need to use Correlated Subqueries, but Conditional Aggregation
should be used instead
Reformat your DATE literals as DATE'yyyy-mm-dd' according to ISO standard as in the below
Using BETWEEN Operator is enough for inclusive date ranges instead of
inequalities
query
SELECT CUSTOMER_ID,
TO_CHAR(TIMEDATE, 'ww') AS WEEK,
NVL(SUM(CASE
WHEN EVENT_CODE = 4 THEN
DURATION_IN_SECONDS / 60
END),
0) - NVL(SUM(CASE
WHEN EVENT_CODE = 3 THEN
DURATION_IN_SECONDS / 60
END),
0) AS UNPRODUCTIVE_MINUTES
FROM TABLE1 e
WHERE TIMEDATE BETWEEN DATE '2019-10-01' AND DATE '2019-12-31'
GROUP BY CUSTOMER_ID, TO_CHAR(TIMEDATE, 'ww')
ORDER BY CUSTOMER_ID, WEEK
Demo