Calculating datetime difference from separate rows and add them to get total - mysql

Question

Click link below to see image.
I need to get the time diff highlighted in red and the time diff in blue. Then add the time together to get the total.
Below is the query that will show all the records.
The first 2 records i will need to get the time difference, which will be around 3 days 4 hours and the last 2 records should only be 2 mins. So in total it should be AROUND 3 days 4 hours and 2 mins.
query image
select so
, createDate
, o
, n
from userTrans
where ( n = 10 OR o = 10 ) and so = 'g220'
Below will show that i grouped the records to get the total time. This is not what i want because it is getting the min and max time diff. The result turns out to be 32 hours.
select so
, min(createDate) minDate
, max(createDate) maxDate
, TIMESTAMPDIFF(MINUTE, min(createDate), max(createDate)) diff
, CONCAT(
FLOOR(HOUR(TIMEDIFF(min(createDate), max(createDate))) / 24), ' days ',
MOD(HOUR(TIMEDIFF(min(createDate), max(createDate))), 24), ' hours ',
MINUTE(TIMEDIFF(min(createDate), max(createDate))), ' minutes') diff1
, count(*) hits
from userTrans
where ( n = 10 OR o = 10 ) and so = 'g220'
group by so
order by TIMESTAMPDIFF(MINUTE, min(createDate), max(createDate)) DESC
Will this be possible to achieve? I hope I was clear.
Thank you

Answer 1

You can use a correlated subquery to align the 2 date/time references for a calculation.
SELECT
*
, TIME_TO_SEC(TIMEDIFF(createDate,nextcreatedate))
FROM (
SELECT
so
, createDate
, (
SELECT
createDate
FROM table1 AS t2
WHERE t2.so = t1.so
AND t2.createDate > t1.createDate
ORDER BY
CreaDate
LIMIT 1
)
AS nextcreatedate
, n
, test
FROM table1 AS t1
WHERE o = 0
) d
In other dbms systems using lead() might provide a more convenient of getting the next needed createdate value.