CREATE TABLE SQL_TABL (
ORD_DATE Date,
PROD_CODE Varchar2(10),
CUST_CODE Varchar2(10),
QTY Number(2),
UNIT_PRICE Number(5,2),
SHIP_DATE Date,
CARR_CODE Varchar2(12),
SHIP_COST Number(5,2),
PMT_DATE Date
);

insert into SQL_TABL values ('08-Jan-05', 'A-50-0013', 'Cu-08-143',
4,
181.79, '09-Jan-05', 'TransCo', 60.27, '15-Jan-05');
insert into SQL_TABL values ('15-Jan-05', 'A-25-0753', 'Cu-08-180',
13, 265.61, '23-Jan-05', 'Expedit', 278.36, '29-Jan-05');
insert into SQL_TABL values ('19-Jan-05', 'A-24-0101', 'Cu-08-133',
20, 120.18, '22-Jan-05', 'Expedit', 188.28, '29-Jan-05');
insert into SQL_ASSGN_2 values ('30-Jan-05', 'B-63-0023', 'Cu-4-078',
4,
280.88, '09-Feb-05', 'Expedit', 92.93, '04-Feb-05');


hi every one i have a a table like such and many things to do on it,
since i am new to sql and i know how important it is, i want you
please to help if you see me posting again and agian dont get bored
with me please, i ll be posting my attempts and whoever wants can
help me, as a first task i want to


A - Produce total sales per ratio of Delivery/Payment (ratio of
interval lengths)
and Group them in intervals of 0.2.
(for this A question i ahve no idea guys so if you want to help
please
explain me the procedure)


B - Produce total sales per Product Hyper group.
(A hyper group is a group of Product Group Codes. Group codes from 0
to 9 form Group0. Codes from 10 to 19 form Group10 etc.)


and here is my attempt which doesnt work because of 2 reasons i
suspect :
select (QTY*UNIT_PRICE), to_number(substr(PROD_CODE,3,2)) % 10 from
SQL_TABL
1st is because of the 2 inthe substr thing since it is not dynamic so
a group of one character wont be acceptable as i think , i am not
sure
at all and the second is that i am trying to use % for modulo, you
experts know,
NB for anybody who helps
first thanks and second please give me some details to know whats the
philosophy because i am here to improve my skills