Pivot table query - PLEASE HELP

Question

I have one requirement whichis similar like this.
I have following tables.
POSITIONS (one account holds multiple securities)
account_id     security_id     total
1          101          300
1          102          500
2          102          300
2          103          600
3          104          400
4          104          800
SECURITIES
security_id     security_name     country          region
101          ABC          USA          NA
102          EFG          USA          NA
103          PQR          GBR          EUR
104          XYZ          CANADA          NA
I will get all the account numbers from front end application, for which I have to display output like this. For example I am getting accounts, 1,2,3 and 4 and have to display like columns at the end. I have to groupy by region and country.
REGION     COUNTRY          SECURITY_ID     SECURITY_NAME          1     2     3     4
NA     USA          101          ABC               300
               102          EFG               500     300
                         COUNTRY TOTAL          800     300
     CANADA          104          XYZ                         400     800
                         REGION TOTAL          800     300     400     800
EUR     GBR          103          PQR                    600
                         COUNTRY TOTAL               600          
                         REGION TOTAL          800     900     400     800
I am working on Oracle 9i Release 2 and front end is .net. Can anyone please help me out with a solution using a query or a stored proc. For Stored procedure, I should send refcurser as OUT parameter or any possible solution.
Thanks in advance.

Answer 1

You could do the following:
In SQL
You can use the decode function and SUM over it.
Get the totals by region and country
select region,country, s.sec_id, sec_name,
sum(decode(acct_id,1,total,0)) a1,
sum(decode(acct_id,2,total,0)) a2,
sum(decode(acct_id,3,total,0)) a3,
sum(decode(acct_id,4,total,0)) a4
from positions p, securities s
where p.SEC_ID = s.SEC_ID
group by region,country, s.sec_id, sec_name
You can run similar sql to get totals by country or region separately ... just remove from select and group by clause the column name that you do not want to be displayed.
The limitation here is that you would need to write the decode statement for every account. Some programming may be needed here.
In PLSQL
create or replace procedure acct_sum (cr OUT sys_refcursor)
is
cursor c1 is
select distinct acct_id from positions order by 1 asc;
var1 varchar2(1000) := ' ';
var2 varchar2(1000);
begin
for i in c1 loop
var1 := var1 || ' sum(decode(acct_id, ' || i.acct_id || ', total,0) ),';
end loop;
var1 := substr(var1,1,length(var1)-1);
open cr for
'select region,country, s.sec_id, sec_name, ' || var1 ||
'from positions p, securities s
where p.SEC_ID = s.SEC_ID
group by region,country, s.sec_id, sec_name';
end acct_sum;
You may want to modify the code so pass in an array of accounts and loop through the content to get all the accounts.
Hope this helps
Shakti
http://www.impact-sol.com
Developers of Guggi Oracle - Tool for DBAs and Developers