adding sub total to the query

hi
referring to this question
http://www.experts-exchange.com/questions/28687885/Select-Sum-Items-Of-A-Cursor.html

i have this query

select CATEGORYID,cat , gross, net, discount, 
(to_char(nvl(100 * (gross/sum(gross) over()),0),'fm9990.00')||'%' ) Cat_Perc,
(to_char(nvl(100 * (Discount/gross),0),'fm9990.00')||'%') Disc_Perc,
 sum(gross) over() total_price from (
select CATEGORYID, cat ,
sum(PRICE) Gross,sum(DISCPRIC) Net,(sum(discount)) Discount , sum(quantity) QTY 
from 
sales_det
where 
TO_char(dob, 'dd-mm-yyyy') >= '01-04-2015'
and TO_char(dob, 'dd-mm-yyyy') <= '30-04-2015'
group by CATEGORYID, cat )
order by gross desc ;

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this query deplays catigory and sales amounts
ok , if i want to add a row for a specific selection of catigory
for example , catigory in (2,3,4)
add sum(gross) , sum(net), sum(disount)
to the next of catigory number 4
then continue other records
NiceMan331Asked:
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awking00Information Technology SpecialistCommented:
Can you provide some sample data for sales_det and what you would like to see as results?
slightwv (䄆 Netminder) Commented:
I do not understand what you are asking that is different.

If you want a SUM on every row for various categories, just do the SUM with CASE and OVER from the previous question.

If you want something different, please post sample data and expected results so we can see what you are trying to do.
NiceMan331Author Commented:
If you want a SUM on every row for various categories
exactly
just do the SUM with CASE and OVER from the previous question.
you mean it will be added column ? ok , is it possible to do it as rows under various catigories ?
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slightwv (䄆 Netminder) Commented:
>>you mean it will be added column

Yes.

>> is it possible to do it as rows under various catigories ?

This is different than what you stated "exactly" in above when I asked "If you want a SUM on every row for various categories"

If you want a new row to contain the sub totals, it might be able to be done but not easily.  Remember in a previous question of yours I mentioned UNION ALL and some smoke and mirrors?

This is what I meant.

It will need to be a separate query that returns the sub-totals.  You'll need to include some sort columns in ALL the queries so when you do an "order by" the rows come back in the correct order.
NiceMan331Author Commented:
ok
can you post an example of that considering when catigoryid < 4 only
then i can adjust the others
slightwv (䄆 Netminder) Commented:
sum(case when gross < 4 then gross end) over()
NiceMan331Author Commented:
This is as a column , I need an example as your suggestion to make row of sub total
slightwv (䄆 Netminder) Commented:
Here is a simple test case showing what I mean:
drop table tab1 purge;
create table tab1(group_name char(1), qty number);

insert into tab1 values('a',1);
insert into tab1 values('a',1);
insert into tab1 values('a',1);
insert into tab1 values('b',2);
insert into tab1 values('b',2);
commit;

select case when sort_order = 2 then 'Sub Total' else group_name end my_label, qty from (
	select 1 sort_order, group_name, qty from tab1
	union all
	select 2 sort_order, group_name, sum(qty) from tab1 group by group_name
)
order by group_name, sort_order
/

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NiceMan331Author Commented:
Ok I got it , let me do my calculation on Saturday , cause I'm now day off , thanx
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