Oracle Decode using Between criteria in Oracle 8

I want to use Oracle decode command using a between syntax.
I have Oracle 8.0.5.
I want to return from a date file the day, on condition that if the time is between 8 and 23 it would return the same day, but if the time is between 0 and 7 it woud return the previous day.
Its a working shift.
I used:
select decode(to_char(weight_out_date,'HH'),(between 8 and 11),to_char(weight_out_date,'DD-MM-YYYY'),
to_char(weight_out_date-1,'DD-MM-YYYY'))) Date_out

Pls advice accordingly
LVL 14
Ehab SalemIT ManagerAsked:
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schwertnerCommented:
decode(to_char(weight_out_date,'HH'), 8 ,to_char(weight_out_date,'DD-MM-YYYY'),
9 ,to_char(weight_out_date,'DD-MM-YYYY'),
10 ,to_char(weight_out_date,'DD-MM-YYYY'),
11,to_char(weight_out_date,'DD-MM-YYYY'),
to_char(weight_out_date-1,'DD-MM-YYYY'))

CASE is also possibility, but it is not introduced in Oracle 8
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SujithData ArchitectCommented:
select decode(sign(to_number(to_char(weight_out_date,'HH24'))-8), -1, to_char(weight_out_date-1,'DD-MM-YYYY') , to_char(weight_out_date,'DD-MM-YYYY') )
from <table>;
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Ehab SalemIT ManagerAuthor Commented:
Well, I think sujith80 solution will not work. I need from 8 AM to 12 AM to be the same day, and from 12 AM to 8 AM to be the previous day.
With some additions to schwertner solution it worked, I just added 12,13,... till 23, and corrected:
decode(to_char(weight_out_date,'HH') to be decode(to_char(weight_out_date,'HH24'),

Thanks
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SujithData ArchitectCommented:
good,
but have a look at the question posted "if the time is between 8 and 23 it would return the same day, but if the time is between 0 and 7 it woud return the previous day."

If you like to change it as "from 8 AM to 12 AM to be the same day, and from 12 AM to 8 AM to be the previous day" - it can be done with a minor adjustment in the above posted query.
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