addm report with sysdate - hours - need yesterday between 10am and 12pm

oracle 11 running addm report
the report that you helped with before works fine - just trying to adjust the time period for the report

running the report at 10AM system time
I want 10AM to 12PM yesterday

WHERE begin_interval_time >=  trunc(sysdate -20/24) and end_interval_time < trunc(sysdate -8/24);

report returns dates
29-JUL-15 01.00.26 AM
29-JUL-15 11.00.11 PM

can you tell me what I have wrong?

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johnsoneSenior Oracle DBACommented:
Did you check what those date functions return?  They should be giving you:

07/29/2015 00:00:00 and 07/30/2015 00:00:00

It isn't hard to check them before you put them in the query, just do:

select trunc(sysdate -20/24), trunc(sysdate -8/24)
from dual;

I don't think that is what you are looking for.

10:00 AM yesterday would be TRUNC(SYSDATE) - (14/24)
12:00 PM yesterday would be TRUNC(SYSDATE) - (12/24)
bkreynolds48Author Commented:
so that would be

WHERE begin_interval_time >=  trunc(sysdate) - (14/24) and end_interval_time < trunc(sysdate) - (12/24);
begin_interval_time >= trunc(sysdate-1) + 10/24        -- 00:00:00 yesterday  plus 10 hours, 10am
and end_interval_time < trunc(sysdate-1) + 12/24      -- 00:00:00 yesterday plus 12 hours, 12pm

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bkreynolds48Author Commented:
thanks - that worked
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