Обсуждение: sql question
Please help, I am trying to write an SQL statement but with no success as I am just starting out with sql. I have a table with 3 columns: Account# ,OrderType and date example of data: Account# ¦ Ordertype ¦ Date 1 ¦ A ¦ April 1 ¦ B ¦ May 1 ¦ B ¦ May 2 ¦ B ¦ April 2 ¦ B ¦ May 2 ¦ C ¦ May 3 ¦ C ¦ May I need to write a select that will show me the totals of EACH type for EACH account AND total ordersplaced for a SPECIFIC month eg..Show me the results for May... account ¦ TotA ¦ TotB ¦ TotC ¦ Total 1 ¦ 0 ¦ 2 ¦ 0 ¦ 2 2 ¦ 0 ¦ 1 ¦ 1 ¦ 2 3 ¦ 0 ¦ 0 ¦ 1 ¦ 1 I can use temp tables, but need a solution written as basic as pssible so I can understand it (all in the form select this from that) any help would be fantastic as I am completely stuck and have been trying for about a week thanks sgebbie@ciaoweb.it -- Sent by sgebbie from ciaoweb piece from it This is a spam protected message. Please answer with reference header. Posted via http://www.usenet-replayer.com/cgi/content/new
Hi, I don't know if it's useful, but there are a number of SQL tutorials available at http://www.newbienetwork.net/sections.php?op=listarticles&secid=5 and there is a list of all sorts of useful PostgreSQL & SQL resources (including tutorials) at http://techdocs.postgresql.org/oresources.php :-) Regards and best wishes, Justin Clift u95886230@spawnkill.ip-mobilphone.net wrote: > > Please help, I am trying to write an SQL statement but with no success as I am just > starting out with sql. > > I have a table with 3 columns: Account# ,OrderType and date > example of data: > Account# ¦ Ordertype ¦ Date > 1 ¦ A ¦ April > 1 ¦ B ¦ May > 1 ¦ B ¦ May > 2 ¦ B ¦ April > 2 ¦ B ¦ May > 2 ¦ C ¦ May > 3 ¦ C ¦ May > > I need to write a select that will show me the totals of EACH type for EACH account AND > total ordersplaced for a SPECIFIC month eg..Show me the results for May... > > account ¦ TotA ¦ TotB ¦ TotC ¦ Total > 1 ¦ 0 ¦ 2 ¦ 0 ¦ 2 > 2 ¦ 0 ¦ 1 ¦ 1 ¦ 2 > 3 ¦ 0 ¦ 0 ¦ 1 ¦ 1 > > I can use temp tables, but need a solution written as basic as pssible so I can understand > it (all in the form select this from that) > any help would be fantastic as I am completely stuck and have been trying for about a week > > thanks > sgebbie@ciaoweb.it > > > -- > Sent by sgebbie from ciaoweb piece from it > This is a spam protected message. Please answer with reference header. > Posted via http://www.usenet-replayer.com/cgi/content/new > > ---------------------------(end of broadcast)--------------------------- > TIP 6: Have you searched our list archives? > > http://www.postgresql.org/search.mpl -- "My grandfather once told me that there are two kinds of people: those who work and those who take the credit. He told me to try to be in the first group; there was less competition there." - Indira Gandhi
On Sun, May 13, 2001 at 06:45:05PM +0000, u95886230@spawnkill.ip-mobilphone.net wrote:
> I have a table with 3 columns: Account# ,OrderType and date
> example of data:
> Account# ¦ Ordertype ¦ Date
> 1 ¦ A ¦ April
> 1 ¦ B ¦ May
> 1 ¦ B ¦ May
> 2 ¦ B ¦ April
> 2 ¦ B ¦ May
> 2 ¦ C ¦ May
> 3 ¦ C ¦ May
>
>
> I need to write a select that will show me the totals of EACH type for EACH account AND
> total ordersplaced for a SPECIFIC month eg..Show me the results for May...
>
> account ¦ TotA ¦ TotB ¦ TotC ¦ Total
> 1 ¦ 0 ¦ 2 ¦ 0 ¦ 2
> 2 ¦ 0 ¦ 1 ¦ 1 ¦ 2
> 3 ¦ 0 ¦ 0 ¦ 1 ¦ 1
>
> I can use temp tables, but need a solution written as basic as pssible so I can understand
> it (all in the form select this from that)
> any help would be fantastic as I am completely stuck and have been trying for about a week
don't you hate that? :)
sql is not like perl or basic in that you can start this over
here, assign a variable, break your output into chunks and do
various voodoo to it before it comes out. all sql does is ask
for records from a database, to return them in a certain order
or in certain groups.
select city,state,count(id),sum(id)
from mycontacts
group by state,city;
that'll show you something like
chicago il 12 345
evanston il 3 121
springfield il 9 208
evansville in 5 184
jasper in 4 166
terre haute in 6 201
henderson ky 5 190
louisville ky 8 124
if you're pulling those results into a program (php? perl?) then
you can do interesting things such as output a break on state
boundaries to compute state subtotals, and so forth.
of course, there are devious individuals out there who don't
know how to play by the rules and they make sql do some amazing
handsprings. but those people are not much fun at parties.
(and seldom attend, anyway.)
--
What do I need manners for? I already got me a wife.
-- Adam Pontipee, "Seven Brides for Seven Brothers"
will@serensoft.com
http://sourceforge.net/projects/newbiedoc -- we need your brain!
http://www.dontUthink.com/ -- your brain needs us!
On Wed, 16 May 2001, will trillich wrote: > On Sun, May 13, 2001 at 06:45:05PM +0000, u95886230@spawnkill.ip-mobilphone.net wrote: > > I have a table with 3 columns: Account# ,OrderType and date > > example of data: > > Account# ¦ Ordertype ¦ Date > > 1 ¦ A ¦ April > > 1 ¦ B ¦ May > > 1 ¦ B ¦ May > > 2 ¦ B ¦ April > > 2 ¦ B ¦ May > > 2 ¦ C ¦ May > > 3 ¦ C ¦ May > > > > > > I need to write a select that will show me the totals of EACH type for EACH account AND > > total ordersplaced for a SPECIFIC month eg..Show me the results for May... > > > > account ¦ TotA ¦ TotB ¦ TotC ¦ Total > > 1 ¦ 0 ¦ 2 ¦ 0 ¦ 2 > > 2 ¦ 0 ¦ 1 ¦ 1 ¦ 2 > > 3 ¦ 0 ¦ 0 ¦ 1 ¦ 1 > > > > I can use temp tables, but need a solution written as basic as pssible so I can understand > > it (all in the form select this from that) > > any help would be fantastic as I am completely stuck and have been trying for about a week > > if you're pulling those results into a program (php? perl?) then > you can do interesting things such as output a break on state > boundaries to compute state subtotals, and so forth. You can do it in SQL, with something like: SELECT accountnum, (SELECT count(*) FROM data a WHERE a.accounttype='a' and a.accountnum=o.accountnum) AS TotA, .. < same for B and C > .. FROM data o group by accoutnum; It won't be terribly fast, but, then, getting all this data into Python or Perl and doing it there won't be so speedy either. HTH, -- Joel Burton <jburton@scw.org> Director of Information Systems, Support Center of Washington
select sum(case when ordertype='A' then 1 else 0 end) as TotA, sum(case when ordertype='B' then 1 else 0 end) as TotB, sum(case when ordertype='C' then 1 else 0 end) as TotC From Thetable where Date="May" This works if you know how many columns(OrderTypes) that you have. If you do not know this query can be built dynamically. Rob <u95886230@spawnkill.ip-mobilphone.net> wrote in message news:l.989779505.1960693359@[212.171.170.132]... > Please help, I am trying to write an SQL statement but with no success as I am just > starting out with sql. > > I have a table with 3 columns: Account# ,OrderType and date > example of data: > Account# ¦ Ordertype ¦ Date > 1 ¦ A ¦ April > 1 ¦ B ¦ May > 1 ¦ B ¦ May > 2 ¦ B ¦ April > 2 ¦ B ¦ May > 2 ¦ C ¦ May > 3 ¦ C ¦ May > > > I need to write a select that will show me the totals of EACH type for EACH account AND > total ordersplaced for a SPECIFIC month eg..Show me the results for May... > > account ¦ TotA ¦ TotB ¦ TotC ¦ Total > 1 ¦ 0 ¦ 2 ¦ 0 ¦ 2 > 2 ¦ 0 ¦ 1 ¦ 1 ¦ 2 > 3 ¦ 0 ¦ 0 ¦ 1 ¦ 1 > > I can use temp tables, but need a solution written as basic as pssible so I can understand > it (all in the form select this from that) > any help would be fantastic as I am completely stuck and have been trying for about a week > > thanks > sgebbie@ciaoweb.it > > > > > -- > Sent by sgebbie from ciaoweb piece from it > This is a spam protected message. Please answer with reference header. > Posted via http://www.usenet-replayer.com/cgi/content/new