How to convert the time difference to hours(with 2 decimal place) in derby?

问题

I am using timestampdiff in derby db to retrieve the time difference between 2 time: startdate, and enddate. e.g.

startdate = 2010-02-23 02:59:52.045 enddate = 2010-02-23 03:45:39.898

select {fn timestampdiff(SQL_TSI_HOUR, startdate, enddate)} as diff 

I would like to know how can I get the time diff in hours, e.g. 0.25, etc?

Thank you.

回答1:

select {fn timestampdiff(SQL_TSI_MINUTE, startdate, enddate)}/60 as diff 

and I would call the variables startdatetime and enddatetime.

回答2:

Specifically for HOURS difference use "SQL_TSI_HOUR"

select {fn timestampdiff(SQL_TSI_HOUR, startdate, enddate)} as diff 

see here: https://docs.faircom.com/doc/sqlref/33476.htm

来源：https://stackoverflow.com/questions/2468428/how-to-convert-the-time-difference-to-hourswith-2-decimal-place-in-derby