Обсуждение: Re: Potentially annoying question about date ranges (part 2)

I have a similar question,

I receive payments, but not every day (or even every week),
and I would like see how much I receive per week and/or per
month. I also need to compare different years.

I also would like to see what the (accumulated) sum of the
payments is at the end of a given week, month.

And then of course I would like to show this to someone, ie
make a graph. X-Axis 12 months (or 52 weeks). Left X-Axis the amounts
for the bars which should be in different colors (per month/bar), right
Y-Axis the amounts for the totals as a line (so that the bars don't
become too flat).

If such a combined graph is not possible/feasible, I could live with
one plot each per year.

I got the usual tools on the Mac, including R, gnuplot and fink.

any help would be appreciated.

el

on 9/30/06 8:34 PM Jan Danielsson said the following:

> I'm going to assume that this question has been asked a gazillion
> times, and is in every SQL book known to man and aliens.  And I also
> assume it is in the FAQ. But I'm going to ask anyway.
>
> I have a database in which I store my purchases -- mainly for
> entertainment (you have no idea how dull my life is).
>
> In an effort to get some variation in my life, I thought I'd find
> out how much of my valuable money I waste each day - on average.


--
If you want to email me, replace nospam with el

Eberhard Lisse wrote:
> I receive payments, but not every day (or even every week),
> and I would like see how much I receive per week and/or per month. I
> also need to compare different years.
>
> I also would like to see what the (accumulated) sum of the payments
> is at the end of a given week, month.

Timestamp each transaction, then use a GROUP BY clause to aggregate the
numbers however you wish.  If the available date field extractions are
not sufficient, write a scalar function of your own to accomplish what
you need.

--
Guy Rouillier

Ok, Ok, Ok,

Practical PostgreSQL, Chapter 5, date_part(), to_char()

I got it :-)-O

el

on 10/8/06 9:43 AM Eberhard Lisse said the following:
> Thank you very much.
>
> Sorry to be unclear, they are time stamped, and I wondered if someone
> could give me ssome advise how I do this aggregation. In particular do
> I not know how to write such a scalar function.
>
> Anything re-usable lying around as examples somewhere?
>
> el
>
> on 10/4/06 9:46 PM Guy Rouillier said the following:
>> Eberhard Lisse wrote:
>>> I receive payments, but not every day (or even every week),
>>> and I would like see how much I receive per week and/or per month. I
>>> also need to compare different years.
>>>
>>> I also would like to see what the (accumulated) sum of the payments
>>> is at the end of a given week, month.
>> Timestamp each transaction, then use a GROUP BY clause to aggregate the
>> numbers however you wish.  If the available date field extractions are
>> not sufficient, write a scalar function of your own to accomplish what
>> you need.
>>
>

--
If you want to email me, replace nospam with el

Thank you very much.

Sorry to be unclear, they are time stamped, and I wondered if someone
could give me ssome advise how I do this aggregation. In particular do
I not know how to write such a scalar function.

Anything re-usable lying around as examples somewhere?

el

on 10/4/06 9:46 PM Guy Rouillier said the following:
> Eberhard Lisse wrote:
>> I receive payments, but not every day (or even every week),
>> and I would like see how much I receive per week and/or per month. I
>> also need to compare different years.
>>
>> I also would like to see what the (accumulated) sum of the payments
>> is at the end of a given week, month.
>
> Timestamp each transaction, then use a GROUP BY clause to aggregate the
> numbers however you wish.  If the available date field extractions are
> not sufficient, write a scalar function of your own to accomplish what
> you need.
>

--
If you want to email me, replace nospam with el