Обсуждение: Sum
Hello All,
I have a single table as:
cod date value
---+-------------+-------
1 | 2002-03-12 | 5
2 | 2002-03-13 | 4
3 | 2002-03-13 | 7
4 | 2002-03-14 | 3
... and I would like to do a select that do `partial sums'.
So, for instance, I would like to do a select that returns:
cod date value partial sum
---+-------------+-------+--------------
1 | 2002-03-12 | 5 | 5
2 | 2002-03-13 | 4 | 9
3 | 2002-03-13 | 7 | 16
4 | 2002-03-14 | 3 | 19
As you can see, the row `partial sum' is what I am looking for. Do you
have any idea how can I do it?
Thanks in advance,
Marcelo Pereira
-- Remember that only God and Esc+:w saves.
__
(_.\ Marcelo Pereira |
/ / ___ marcelo@pereira.com |
/ (_/ _ \__ [Math|99] - IMECC |
_______\____/_\___)___Unicamp_______________/
I don't know of a SQL query that would do it, but you could do it in pgsql or some other language... just run the normal query (the first one) and then as you loop through the result set add 'value' to 'partial_sum' and there you have it... -philip On Thu, 28 Mar 2002, Marcelo Pereira wrote: > Hello All, > > I have a single table as: > > cod date value > ---+-------------+------- > 1 | 2002-03-12 | 5 > 2 | 2002-03-13 | 4 > 3 | 2002-03-13 | 7 > 4 | 2002-03-14 | 3 > > ... and I would like to do a select that do `partial sums'. > > So, for instance, I would like to do a select that returns: > > cod date value partial sum > ---+-------------+-------+-------------- > 1 | 2002-03-12 | 5 | 5 > 2 | 2002-03-13 | 4 | 9 > 3 | 2002-03-13 | 7 | 16 > 4 | 2002-03-14 | 3 | 19 > > As you can see, the row `partial sum' is what I am looking for. Do you > have any idea how can I do it? > > Thanks in advance, > > Marcelo Pereira > > -- Remember that only God and Esc+:w saves. > __ > (_.\ Marcelo Pereira | > / / ___ marcelo@pereira.com | > / (_/ _ \__ [Math|99] - IMECC | > _______\____/_\___)___Unicamp_______________/ > > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/users-lounge/docs/faq.html >
Hello Philip,
I am using PHP to show the results in a html file, and I have this
`partial sum' running the same way you told. I am just looking around to
know if I can do this straight from a sql query, without any type of
external script, as I am already doing.
Thanks for you answer.
Best Regards,
Marcelo Pereira
-- Remember that only God and Esc+:w saves.
__
(_.\ Marcelo Pereira |
/ / ___ |
/ (_/ _ \__ Matematica/99 - IMECC |
_______\____/_\___)___Unicamp_______________/
--- Philip Hallstrom, with his fast fingers, wrote:
:> I don't know of a SQL query that would do it, but you could do it in pgsql
:> or some other language... just run the normal query (the first one) and
:> then as you loop through the result set add 'value' to 'partial_sum' and
:> there you have it...
:>
:> -philip
:>
:> On Thu, 28 Mar 2002, Marcelo Pereira wrote:
:>
:> > Hello All,
:> >
:> > I have a single table as:
:> >
:> > cod date value
:> > ---+-------------+-------
:> > 1 | 2002-03-12 | 5
:> > 2 | 2002-03-13 | 4
:> > 3 | 2002-03-13 | 7
:> > 4 | 2002-03-14 | 3
:> >
:> > ... and I would like to do a select that do `partial sums'.
:> >
:> > So, for instance, I would like to do a select that returns:
:> >
:> > cod date value partial sum
:> > ---+-------------+-------+--------------
:> > 1 | 2002-03-12 | 5 | 5
:> > 2 | 2002-03-13 | 4 | 9
:> > 3 | 2002-03-13 | 7 | 16
:> > 4 | 2002-03-14 | 3 | 19
:> >
:> > As you can see, the row `partial sum' is what I am looking for. Do you
:> > have any idea how can I do it?
:> >
:> > Thanks in advance,
:> >
:> > Marcelo Pereira
:> >
:> > -- Remember that only God and Esc+:w saves.
:> > __
:> > (_.\ Marcelo Pereira |
:> > / / ___ marcelo@pereira.com |
:> > / (_/ _ \__ [Math|99] - IMECC |
:> > _______\____/_\___)___Unicamp_______________/
:> >
:> >
:> >
:> > ---------------------------(end of broadcast)---------------------------
:> > TIP 5: Have you checked our extensive FAQ?
:> >
:> > http://www.postgresql.org/users-lounge/docs/faq.html
:> >
:>
Marcelo, Assuming that "cod" is unique and sequencial, you can use the following: SELECT *, ( SELECT SUM( value) from table as t2 where t2.cod <= t1.cod) as running_total FROM table as t1 ORDER BY cod; jll Marcelo Pereira wrote: > > Hello All, > > I have a single table as: > > cod date value > ---+-------------+------- > 1 | 2002-03-12 | 5 > 2 | 2002-03-13 | 4 > 3 | 2002-03-13 | 7 > 4 | 2002-03-14 | 3 > > ... and I would like to do a select that do `partial sums'. > > So, for instance, I would like to do a select that returns: > > cod date value partial sum > ---+-------------+-------+-------------- > 1 | 2002-03-12 | 5 | 5 > 2 | 2002-03-13 | 4 | 9 > 3 | 2002-03-13 | 7 | 16 > 4 | 2002-03-14 | 3 | 19 > > As you can see, the row `partial sum' is what I am looking for. Do you > have any idea how can I do it? > > Thanks in advance, > > Marcelo Pereira
P E R F E C T !!!
Hello Jean-Luc,
Thanks for your answer, it was exacty what I was needing.
Best Regards,
See ya,
Marcelo Pereira
-- Remember that only God and Esc+:w saves.
__
(_.\ Marcelo Pereira |
/ / ___ |
/ (_/ _ \__ Matematica/99 - IMECC |
_______\____/_\___)___Unicamp_______________/
--- Jean-Luc Lachance, with his fast fingers, wrote:
:> Marcelo,
:>
:> Assuming that "cod" is unique and sequencial, you can use the following:
:>
:> SELECT *, ( SELECT SUM( value) from table as t2 where t2.cod <= t1.cod)
:> as running_total
:> FROM table as t1
:> ORDER BY cod;
:>
:> jll
:>
:>
:> Marcelo Pereira wrote:
:> >
:> > Hello All,
:> >
:> > I have a single table as:
:> >
:> > cod date value
:> > ---+-------------+-------
:> > 1 | 2002-03-12 | 5
:> > 2 | 2002-03-13 | 4
:> > 3 | 2002-03-13 | 7
:> > 4 | 2002-03-14 | 3
:> >
:> > ... and I would like to do a select that do `partial sums'.
:> >
:> > So, for instance, I would like to do a select that returns:
:> >
:> > cod date value partial sum
:> > ---+-------------+-------+--------------
:> > 1 | 2002-03-12 | 5 | 5
:> > 2 | 2002-03-13 | 4 | 9
:> > 3 | 2002-03-13 | 7 | 16
:> > 4 | 2002-03-14 | 3 | 19
:> >
:> > As you can see, the row `partial sum' is what I am looking for. Do you
:> > have any idea how can I do it?
:> >
:> > Thanks in advance,
:> >
:> > Marcelo Pereira
:>
After much thought on Mar 28 Jean-Luc Lachance wrote: > Marcelo, > > Assuming that "cod" is unique and sequencial, you can use the following: > > SELECT *, ( SELECT SUM( value) from table as t2 where t2.cod <= t1.cod) > as running_total > FROM table as t1 > ORDER BY cod; > > jll > Subqueries outside of the where clause are great! I hadn't come accross them when working with the more well advertised database products. Are they SQL9x compliant? I try to develop using non postgres specific tools when I can. Jim
Maybe our resident expert on SQL standard, Tom Lane, would care to answer this one. Jim Martinez wrote: > > After much thought on Mar 28 Jean-Luc Lachance wrote: > > > Marcelo, > > > > Assuming that "cod" is unique and sequencial, you can use the following: > > > > SELECT *, ( SELECT SUM( value) from table as t2 where t2.cod <= t1.cod) > > as running_total > > FROM table as t1 > > ORDER BY cod; > > > > jll > > > > Subqueries outside of the where clause are great! I hadn't come accross > them when working with the more well advertised database products. > > Are they SQL9x compliant? I try to develop using non postgres specific > tools when I can. > > Jim
Hi all, Is there a way to abort a pgaccess query? jll