Confusion in tracking time difference in APEX

Question

Hi,
I am using the following code to track the the time difference in APEX:
<code>
select nvl(decode(trunc(max(end_time)-min(start_time)),0,'',null,'',trunc(max(end_time)-min(start_time))||' Days ') ||
decode(trunc(mod((max(end_time)-min(start_time))*24,24)),0,'',null,'',trunc(mod((max(end_time)-min(start_time))*24,24))||' Hours ')||
decode(trunc(mod((max(end_time)-min(start_time))*24*60,60)),0,'',null,'',trunc(mod((max(end_time)-min(start_time))*24*60,60))||' Minutes'),'No End Time') as time
from xyz
where page_num between 200 and 207
and id = :APP_USER;
</code>
The above code works fine in DB 11.1 version, when I migrated the project to DB 11.2, the above code doesn't give me the exact values.
Suppose if the actual time taken was 4 minutes, it is displayed as 2 hours 16 mins in DB 11.2 version.
Can someone help me to fix this?

Answer 1

>
Please update your forum profile with a real handle instead of "935799".
I am using the following code to track the the time difference in APEX:
&lt;code&gt;It's <tt>\</tt> not <tt>&lt;code&gt;</tt>:select nvl(decode(trunc(max(end_time)-min(start_time)),0,'',null,'',trunc(max(end_time)-min(start_time))||' Days ') ||
decode(trunc(mod((max(end_time)-min(start_time))*24,24)),0,'',null,'',trunc(mod((max(end_time)-min(start_time))*24,24))||' Hours ')||
decode(trunc(mod((max(end_time)-min(start_time))*24*60,60)),0,'',null,'',trunc(mod((max(end_time)-min(start_time))*24*60,60))||' Minutes'),'No End Time') as time
from xyz
where page_num between 200 and 207
and id = :APP_USER;
The above code works fine in DB 11.1 version, when I migrated the project to DB 11.2, the above code doesn't give me the exact values.
Suppose if the actual time taken was 4 minutes, it is displayed as 2 hours 16 mins in DB 11.2 version.
I think you must be missing something. Is the data exactly the same? Are the database/host configured exactly the same (clock settings; timezones etc)?
Create a reproducible test case of the form:with xyz as (
select &lt;data that reproduces the problem&gt; start_time, &lt;data that reproduces the problem&gt; end_time from dual
union all
select &lt;data that reproduces the problem&gt; start_time, &lt;data that reproduces the problem&gt; end_time from dual
union all
select nvl(decode(trunc(max(end_time)-min(start_time)),0,'',null,'',trunc(max(end_time)-min(start_time))||' Days ') ||
decode(trunc(mod((max(end_time)-min(start_time))*24,24)),0,'',null,'',trunc(mod((max(end_time)-min(start_time))*24,24))||' Hours ')||
decode(trunc(mod((max(end_time)-min(start_time))*24*60,60)),0,'',null,'',trunc(mod((max(end_time)-min(start_time))*24*60,60))||' Minutes'),'No End Time') as time
from xyz