问题
I have a scenario to calculate difference of timestamp in minute. There is one common field in 2 tables i.e dw_job_id and want to join 2 tables and guessing, calculate
(scratch.COGIPF_RUNREPORT_test2.end_ts - concat(proct_dt, scratch.dw_job_sla_dim_test.sla_time)
Example, Subtraction in minute:
(2018-03-05 01:53:14.201000 - 2018-03-05 08:00:00.000000)= -366
It would be quite clear using below records:
1st query has end_ts:
sel * from scratch.COGIPF_RUNREPORT_test2 where dw_job_id=1226
Result:
dw_job_id proct_dt start_ts end_ts time_diff dw_job_status_id
1,226 2018-03-05 00:00:00 2018-03-05 01:50:23 2018-03-05 01:53:14.201000 3 12
1,226 2018-03-06 00:00:00 2018-03-06 01:42:56 2018-03-06 01:45:23.553000 3 12
2nd query :
select * from scratch.dw_job_sla_dim_test where dw_job_id=1226
Result:
dw_job_id sla_hour sla_minute sla_time
1,226 8 0 08:00:00.000000
Final result should be:
dw_job_id run_date start_timestamp end_timestamp runtime_minutes sla_miss_minutes
1,226 3/5/2018 3/5/2018 01:50:23.000000 3/5/2018 01:53:14.201000 2 -366
1,226 3/6/2018 3/6/2018 01:42:56.000000 3/6/2018 01:45:23.553000 2 -374
Example:
Subtraction in minute :-(2018-03-05 01:53:14.201000 - 2018-03-05 08:00:00.000000)= -366
Data types:
sla_hour INTEGER,
sla_minute INTEGER,
sla_time TIME(6),
end_ts VARCHAR(50) CHARACTER SET LATIN NOT CASESPECIFIC,
回答1:
I have used the following logic in the past. But I think its what you are after.
,(CAST((CAST(end_timestamp AS DATE)- CAST(start_timestamp AS DATE)) AS DECIMAL(18,6)) * 60*24)
+ ((EXTRACT( HOUR FROM end_timestamp) - EXTRACT( HOUR FROM start_timestamp))* 60)
+ ((EXTRACT(MINUTE FROM end_timestamp) - EXTRACT(MINUTE FROM start_timestamp)) )
+ ((EXTRACT(SECOND FROM end_timestamp) - EXTRACT(SECOND FROM start_timestamp))/60)
AS "Difference in Minutes"
For others I will include my hours and seconds calculations as well
,(CAST((CAST(end_timestamp AS DATE)- CAST(start_timestamp AS DATE)) AS DECIMAL(18,6)) * 60*60*24)
+ ((EXTRACT( HOUR FROM end_timestamp) - EXTRACT( HOUR FROM start_timestamp))* 60*60)
+ ((EXTRACT(MINUTE FROM end_timestamp) - EXTRACT(MINUTE FROM start_timestamp)) * 60)
+ ((EXTRACT(SECOND FROM end_timestamp) - EXTRACT(SECOND FROM start_timestamp)))
AS "Difference in Seconds"
,(CAST((CAST(end_timestamp AS DATE)- CAST(start_timestamp AS DATE)) AS DECIMAL(18,6)) * 24)
+ ((EXTRACT( HOUR FROM end_timestamp) - EXTRACT( HOUR FROM start_timestamp)))
+ ((EXTRACT(MINUTE FROM end_timestamp) - EXTRACT(MINUTE FROM start_timestamp)) / 60.000000)
+ ((EXTRACT(SECOND FROM end_timestamp) - EXTRACT(SECOND FROM start_timestamp)) / 3600.000000)
AS "Difference In Hours"
来源：https://stackoverflow.com/questions/49191484/calculate-time-difference-in-teradata