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* Read count ?
@ 2005-02-24 15:17 Aarni Ruuhimäki <aarni@kymi.com>
0 siblings, 1 reply; 3+ messages in thread
From: Aarni Ruuhimäki @ 2005-02-24 15:17 UTC (permalink / raw)
To: pgsql-sql
Hi,
Could someone please give a hint on how to query the following neatly ?
Get news from a news table that belong to a particular account, get segment
name from segments table for each news item and read count from read history
table that gets a news_id and timestamp insert every time the news is read.
Display everything by news count, most read news first ?
news_id 4, news_header, segment_name x, read 10 times
news_id 2, news_header, segment_name y, read 8 times
news_id 1, news_header, segment_name x, read 7 times
news_id 3, news_header, segment_name x, read 0 times
news_table:
news_id, account_id, segment_id, news_header, ...
segments_table:
segment_id, account_id, segment_name
read_history_table:
history_id, news_id, timestamp
TIA,
Aarni
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* Re: Read count ?
@ 2005-02-26 13:24 Ragnar Hafstað <gnari@simnet.is>
parent: Aarni Ruuhimäki <aarni@kymi.com>
0 siblings, 1 reply; 3+ messages in thread
From: Ragnar Hafstað @ 2005-02-26 13:24 UTC (permalink / raw)
To: aarni@kymi.com; +Cc: pgsql-sql
On Thu, 2005-02-24 at 17:17 +0200, Aarni Ruuhimäki wrote:
> Hi,
>
> Could someone please give a hint on how to query the following neatly ?
>
> Get news from a news table that belong to a particular account, get segment
> name from segments table for each news item and read count from read history
> table that gets a news_id and timestamp insert every time the news is read.
> Display everything by news count, most read news first ?
>
> news_id 4, news_header, segment_name x, read 10 times
> news_id 2, news_header, segment_name y, read 8 times
> news_id 1, news_header, segment_name x, read 7 times
> news_id 3, news_header, segment_name x, read 0 times
>
> news_table:
> news_id, account_id, segment_id, news_header, ...
>
> segments_table:
> segment_id, account_id, segment_name
>
> read_history_table:
> history_id, news_id, timestamp
>
how about:
select news_id,news_header,segment_name,count(*)
from news_table
natural join segments_table
natural join read_history_table
where account_id=?
group by news_id,news_header,segment_name;
?
gnari
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Read count ?
@ 2005-02-28 13:08 Aarni Ruuhimäki <aarni@kymi.com>
parent: Ragnar Hafstað <gnari@simnet.is>
0 siblings, 0 replies; 3+ messages in thread
From: Aarni Ruuhimäki @ 2005-02-28 13:08 UTC (permalink / raw)
To: Ragnar Hafstað <gnari@simnet.is>; +Cc: pgsql-sql
Hi,
Thanks Ragnar. This, and an other GROUP BY + name query within output got me
there.
<cfquery name="get_news" datasource="#ds#">
SELECT DISTINCT news_id, news_header, segment, segment_id, count(*)
FROM news_table
NATURAL JOIN segments_table
NATURAL JOIN read_history
WHERE account_id = #Url.account_id#
GROUP BY news_id, news_header, segment, segment_id ORDER BY count DESC
</cfquery>
...
<cfoutput query="get_news" group="news_id">
<cfquery name="get_seg" datasource="#ds#">
SELECT segment_name
FROM segments_table
WHERE segment_id = #segment#
</cfquery>
#news_header# - #get_seg.segment_name# - #count#
</cfoutput>
On Saturday 26 February 2005 15:24, you wrote:
> On Thu, 2005-02-24 at 17:17 +0200, Aarni Ruuhimäki wrote:
> > Hi,
> >
> > Could someone please give a hint on how to query the following neatly ?
> >
> > Get news from a news table that belong to a particular account, get
> > segment name from segments table for each news item and read count from
> > read history table that gets a news_id and timestamp insert every time
> > the news is read. Display everything by news count, most read news first
> > ?
> >
> > news_id 4, news_header, segment_name x, read 10 times
> > news_id 2, news_header, segment_name y, read 8 times
> > news_id 1, news_header, segment_name x, read 7 times
> > news_id 3, news_header, segment_name x, read 0 times
> >
> > news_table:
> > news_id, account_id, segment, news_header, ...
> >
> > segments_table:
> > segment_id, account_id, segment_name
> >
> > read_history_table:
> > history_id, news_id, timestamp
>
> how about:
>
> select news_id,news_header,segment_name,count(*)
> from news_table
> natural join segments_table
> natural join read_history_table
> where account_id=?
> group by news_id,news_header,segment_name;
>
> ?
>
> gnari
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 7: don't forget to increase your free space map settings
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-- links below jump to the message on this page --
2005-02-24 15:17 Read count ? Aarni Ruuhimäki <aarni@kymi.com>
2005-02-26 13:24 ` Ragnar Hafstað <gnari@simnet.is>
2005-02-28 13:08 ` Aarni Ruuhimäki <aarni@kymi.com>
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