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Date: Tue, 5 Jun 2007 17:57:13 +0300
From: "Loredana Curugiu" <loredana.curugiu@gmail.com>
To: "Oliveiros Cristina" <oliveiros.cristina@marktest.pt>,
	pgsql-novice@postgresql.org, pgsql-sql@postgresql.org
Subject: Re: [SQL] JOIN
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On 6/5/07, Oliveiros Cristina <oliveiros.cristina@marktest.pt> wrote:
>
>  Hello again, Loredana.
>
>
> Additional information required :-)
>
> imagine the following situation
>
> 1| LIA | recv1 | date1 | (date1,date2)
> 2|LIA | recv1 |date 1 | (date2,date3)
> 3| LIA | recv1 | date1 | (date1,date3)
>
>
> Should this yield 6? Or 4?
>
date 1 is not on the second dates column, but it is on the remaining two
>

if the first column is count then the sum(count) should be 4.


Loredana

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<br><br><div><span class="gmail_quote">On 6/5/07, <b class="gmail_sendername">Oliveiros Cristina</b> &lt;<a href="mailto:oliveiros.cristina@marktest.pt">oliveiros.cristina@marktest.pt</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">






<div bgcolor="#ffffff">
<div><font face="Arial" size="2">Hello again, Loredana.</font></div>
<div><font face="Arial" size="2"></font>&nbsp;</div>
<div><font face="Arial" size="2"></font>&nbsp;</div>
<div><font face="Arial" size="2">Additional information required :-)</font></div>
<div><font face="Arial" size="2"></font>&nbsp;</div>
<div><font face="Arial" size="2">imagine the following situation</font></div>
<div><font face="Arial" size="2"></font>&nbsp;</div>
<div><font face="Arial" size="2">1| LIA | recv1 | date1 | (date1,date2)</font></div>
<div><font face="Arial" size="2">2|LIA | recv1 |date 1 | (date2,date3)</font></div>
<div><font face="Arial" size="2">3| LIA | recv1 | date1 | (date1,date3)</font></div>
<div><font face="Arial" size="2"></font>&nbsp;</div>
<div><font face="Arial" size="2"></font>&nbsp;</div>
<div><font face="Arial" size="2">Should this yield 6? Or 4?</font></div></div></blockquote><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff"><div><font face="Arial" size="2">date 1 is not on the second dates column, but it is 
on the remaining two</font></div></div></blockquote><div><br>
if the first column is count then the sum(count) should be 4.<br>
</div><br></div><br>
Loredana<br>

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