Re: IN ignore null values

From: Juan Cachito Reyes Pacheco <jreyes_at_dazasoftware.com>
Date: Fri, 20 Feb 2004 14:48:20 -0400
Message-ID: <000901c3f7e2$1d96fd90$2501a8c0@dazasoftware.com>

1. I don't have only 310 rows, why don't you test.
2. here is an example of the effect of using IN() in a query, as consequence of the inequality NULL=NULL

I don't understand what is not clear here, you can test it by yourself. :)

• Original Message ----- From: <Jared.Still_at_radisys.com> To: <oracle-l_at_freelists.org> Sent: Friday, February 20, 2004 1:18 PM Subject: Re: IN ignore null values

Actually, all this proves is that you have 310 rows in the table utl_tablas_me.
Jared

An interesting observation

IN ignore null values as you can see in the table there are 310 null values
in column TBL_DSM.

SQL> select count(*) from daz.utl_tablas_me

  2 where tbl_dsm in

  3 (select null from daz.utl_tablas_me);

 COUNT(*)

---

        0

SQL> select count(*) from daz.utl_tablas_me

  2 where exists(select null from daz.utl_tablas_me);

 COUNT(*)

---

      310

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Received on Fri Feb 20 2004 - 15:06:06 CST