RE: Slow running Query.

From: Juan Carlos Reyes Pacheco <jreyes_at_dazasoftware.com>
Date: Tue, 22 Jun 2004 13:57:11 -0400
Message-Id: <40D872F7.00000B.02400@CACHITOSS>

Thank Thomas I knew that, but you example is very nice, I'm adding to my paper if you don't have nothing against it.  

-------Original Message-------
 

From: oracle-l_at_freelists.org
Date: 06/22/04 13:40:25
To: oracle-l_at_freelists.org
Subject: RE: Slow running Query.  

FYI... SUM function (for that matter any aggregate function except COUNT, G= ROUPING) ignore NULLs. Try this:  

select sum(nvl(test,5)) from test
8  

select nvl(sum(test),5) from test;
3  

select nvl(sum(test),5) from test
where test is null;
5  

select sum(n) from test;
3        

-----Original Message-----

From: Juan Carlos Reyes Pacheco [mailto:jreyes_at_dazasoftware.com] Sent: Tuesday, June 22, 2004 12:21 PM
To: oracle-l_at_freelists.org
Subject: RE: Slow running Query.    

Hi Lex, why you say that, could you showme why please  

I show you why I say is the same:
SQL> select * from test;  

TEST

---

1  

2  

Transcurrido: 00:00:00.00
SQL> select count(*) from test where test is null;  

COUNT(*)

---

1  

Transcurrido: 00:00:00.00
SQL> select sum(nvl(test,0)) from test;  

SUM(NVL(TEST,0))

---

3  

Transcurrido: 00:00:00.00
SQL> select nvl(sum(test),0) from test;  

NVL(SUM(TEST),0)

---

3  

Transcurrido: 00:00:00.00    

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Received on Tue Jun 22 2004 - 13:02:19 CDT