Re: Bucketing Row Data in columns

Assuming you know your dates beforehand, you could try a CASE
statement. Something like:
select
order_id,
sum(case when timestamp::date = 01/01/2009'' then amount else 0 end)
as amount_day1,
sum(case when timestamp::date = '02/01/2009' then amount else 0 end)
as amount_day2,
sum(case when timestamp::date = '03/01/2009' then amount else 0 end)
as amount_day3
from orders
group by order_id

On Wed, Jun 24, 2009 at 9:39 AM, Sandeep<gibsosmat(at)gmail(dot)com> wrote:
> Hi all,
> I need help on creating a sql, not a problem even if its pl/sql
>
> I have orders table schema is as follow
>
> orders(order_id,user_id, create_timestamp, amount)
>
> and I want to generate a report like
> for the past 3 days bucketing purchases i.e SUM(amount) every day in columns
> i.e result will be having these columns.
>
> (user_id, amount_day1, amount_day2, amount_day3)
>
> ex:
> am leaving order_id assume they are auto incrementing and unique, date
> format dd/mm/yyyy
> (user_id, create_timestamp, amount)
> (user1, 01/01/2009,100)
> (user1, 01/01/2009,100)
> (user2, 01/01/2009,100)
> (user2, 02/01/2009,100)
> (user2, 02/01/2009,100)
> (user1, 02/01/2009,100)
> (user2, 03/01/2009,100)
> (user2, 03/01/2009,100)
> (user3, 03/01/2009,100)
>
>
> result
>
> (user_id, amount_day1, amount_day2, amount_day3)
> (user1, 200, 200, 0)
> (user2, 100, 200, 200)
> (user3, 0, 0, 100)
>
>
> hope you guys got what I am trying to generate through sql.
>
> I could get this data in each row, but I want it in columns.
> Can anyone help me on this? lets assume the buckets are fixed i.e 3 only.
> but I wish to get them unlimited i.e day 1 to day 20.
>
> Regards
> Sandeep Bandela