pg.ddx.io pgsql-sql@postgresql.org mailing list archive
help / color / mirror / Atom feedSum and count weird results
2+ messages / 1 participants
[nested] [flat]
* Sum and count weird results
@ 2004-08-02 11:30 Michalis Kabrianis <mk@interzone.gr>
0 siblings, 1 reply; 2+ messages in thread
From: Michalis Kabrianis @ 2004-08-02 11:30 UTC (permalink / raw)
To: pgsql-sql
Hi all,
I have these tables
a (
id integer,
email varchar);
b (
seat varchar,
transactionid varchar);
c (
transactionid varchar,
totalprice numeric(8.2));
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Sum and count weird results
@ 2004-08-11 17:04 Michalis Kabrianis <mk@interzone.gr>
parent: Michalis Kabrianis <mk@interzone.gr>
0 siblings, 0 replies; 2+ messages in thread
From: Michalis Kabrianis @ 2004-08-11 17:04 UTC (permalink / raw)
To: pgsql-sql
Christoph Haller wrote:
> Michalis Kabrianis wrote:
>
>
>>Hi all,
>>I have these tables
>>
>>a (
>>id integer,
>>email varchar);
>>
>>b (
>>seat varchar,
>>transactionid varchar);
>>
>>c (
>>transactionid varchar,
>>totalprice numeric(8.2));
>>
>>---------------------------(end of broadcast)---------------------------
>>TIP 8: explain analyze is your friend
>
>
> And?
>
Oops, accidental "send button" hit.
I beleived it would never reach the list.
Sorry for that.
Here we go again:
Hi all,
I have these tables
a (
id integer,
email varchar);
b (
seat varchar,
transactionid varchar references c(varchar));
c (
transactionid varchar,
a_id integer references a(id),
totalprice numeric(8.2));
sample data :
table a
1,test1@test.gr
2,test2@test.gr
table b
1,123
2,123
3,123
4,125
5,125
6,127
table c
123,1,200
125,2,100
127,1,300
What I want is to count the seatnr located on table b, and sum the
totalprice located on table c, group by email located on table a.
I tried something like :
select sum(totalprice), count(seatnr), email from a,b,c where
c.transactionid=b.transactionid and c.a_id=a.id
I get correct seatnr count, but wrong (and I understand why) totalprice sum.
Any good ideas on how can that be accomplished in one query?
Ideal results :
SUM COUNT EMAIL
4 500 test1@test.gr
2 100 test2@test.gr
Thanks in advance
Michalis
^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~2004-08-11 17:04 UTC | newest]
Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2004-08-02 11:30 Sum and count weird results Michalis Kabrianis <mk@interzone.gr>
2004-08-11 17:04 ` Michalis Kabrianis <mk@interzone.gr>
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox