UNIX for Dummies Questions & Answers

Dear Folks,
I want to calculate the elapsed hours between two time columns. I am using timestampdiff method for the same. I am able to get the value. But facing an issue of decimal values. For example the elapsed hours between 09:00:00 and 20:30:00 is coming as 11 instead of 11.5. I am using below syntax to get the output.

Code:

select
T_OPEN_TIME,
T_CLSNG_TIME,
TIMESTAMPDIFF
(
8,
char
(
TIMESTAMP(CURRENT date,T_CLSNG_TIME)
-
TIMESTAMP(CURRENT date,T_OPEN_TIME)
)
)
as elapsed_hours
from HOURS_TABLE

Any help would be highly appreciated.

Which is normal, hours are integers...(and not rounded I suppose)
You would need to add minutes, and find an elegant way (by .25 increment?) to ouput as .50 to add to your hour value