How to convert an interval like “1 day 01:30:00” into “25:30:00”?

Question

I need to add some intervals and use the result in Excel.

Since

sum(time.endtime-time.starttime)

returns the interval as \"1 da

Answer 1

In standard SQL, you want to represent the type as INTERVAL HOUR TO SECOND, but you have a value of type INTERVAL DAY TO SECOND. Can you not use a CAST to get to your required result? In Informix, the notation would be either of:

SUM(time.endtime - time.starttime)::INTERVAL HOUR(3) TO SECOND

CAST(SUM(time.endtime - time.starttime) AS INTERVAL HOUR(3) TO SECOND)

The former is, AFAIK, Informix-specific notation (or, at least, not standard); the latter is, I believe, SQL standard notation.