Pivot Query In Oracle

I have a requirement to write a single sql query where i can generate the pivot report. Found some of the examples in Google search. But here we are hard coding the values if it is limited like month in this example.

i want to write similar query to represent the amount based on product type , i have around 200 types of products. I can't write case/ decode statement those many times.

query which will produce the output in pivot format , dynamically depending the number of values.

select Product,
sum(case when Month=�Jan� then Amount else 0 end) Jan,
sum(case when Month=�Feb� then Amount else 0 end) Feb,
sum(case when Month=�Mar� then Amount else 0 end) Mar
from Sales
group by Product