RE: Any known problems using NOT IN ?

From: Naveen, Nahata (IE10) <Naveen.Nahata_at_honeywell.com>
Date: Wed, 17 Dec 2003 22:29:26 -0800
Message-ID: <F001.005DA357.20031217222926@fatcity.com>

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Doess the column crs.os_id_fk1 contain nulls?

Regards
Naveen

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

Sent: Thursday, December 18, 2003 10:54 AM To: Multiple recipients of list ORACLE-L

Hi Gurus,

I have a problem using NOT IN clause in Oracle. However using NOT EXISTS, gives me the right output. Are there any known limitations.

This query selects from the master records wherein child records are not active.

select * from ct_software_release csr where

csr.class = 'NS'

AND csr.active_flag = 'Y'

AND csr.os_id_pk not IN

(SELECT crs.os_id_fk1 FROM CT_ROADMAP_SOFTWARE crs

WHERE crs.active_flag = 'Y');

The sub-query in the above case gives 1800 rows. The above query fails to give any rows.

select * from ct_software_release csr where

csr.class = 'NS'

AND csr.active_flag = 'Y'

AND NOT EXISTS (SELECT 1 FROM CT_ROADMAP_SOFTWARE crs

WHERE crs.os_id_fk1 = csr.os_id_pk

                                AND crs.active_flag  = 'Y');

This above query works fine.

Thanks

Siddharth Haldankar

Zensar Technologies Ltd.

Cisco Systems Inc.

(Offshore Development Center)

# : 091 020 4128394

shaldank_at_cisco.com <mailto:shaldank_at_cisco.com>

s.haldankar_at_zensar.com <mailto:s.haldankar_at_zensar.com>

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<DIV><SPAN class=515151206-18122003><FONT face="Courier New" color=#0000ff

size=2>Doess the column crs.os_id_fk1 contain nulls? </DIV> <DIV> </DIV>
<DIV>Regards</DIV>
<DIV>Naveen</DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"> <DIV class=OutlookMessageHeader dir=ltr align=left>-----Original Message----- From: Siddharth Haldankar [mailto:shaldank_at_cisco.com] Sent: Thursday, December 18, 2003 10:54 AM To: Multiple recipients of list ORACLE-L Subject: Any known problems using NOT IN ? </DIV> <DIV class=Section1>
 Hi Gurus,
   I have a problem using NOT IN clause in Oracle. However using NOT EXISTS, gives me the right output. Are there any known limitations.   This query selects from the master records wherein child records are not active.
   select * from ct_software_release csr where   csr.class         = 'NS'
   AND    csr.active_flag   = 'Y'   AND    csr.os_id_pk not IN   (SELECT crs.os_id_fk1 FROM CT_ROADMAP_SOFTWARE crs         WHERE crs.active_flag  = 'Y');   The sub-query in the above case gives 1800 rows. The above query fails to give any rows.
                                                                                   
 select * from ct_software_release csr where   csr.class         = 'NS'
   AND    csr.active_flag   = 'Y'   AND    NOT EXISTS         (SELECT 1 FROM CT_ROADMAP_SOFTWARE crs         WHERE crs.os_id_fk1 = csr.os_id_pk                                 AND crs.active_flag  =
 'Y');                                                            
   This above query works fine.
       Thanks <DIV class=MsoNormal style="TEXT-ALIGN: center" align=center>

  <HR align=center width="100%" SIZE=2>
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  <P class=MsoPlainText><B><FONT face="Microsoft Sans Serif" size=2><SPAN

style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: 'Microsoft Sans Serif'">Siddharth Haldankar
 Zensar Technologies Ltd.
 Cisco Systems Inc. 
 (Offshore Development Center) #  : 091 020 4128394
 <A href="mailto:shaldank_at_cisco.com">shaldank_at_cisco.com</A> <A href="mailto:s.haldankar_at_zensar.com">s.haldankar_at_zensar.com</A> 
    </DIV></BLOCKQUOTE></BODY></HTML>

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Author: Naveen, Nahata (IE10)
  INET: Naveen.Nahata_at_honeywell.com

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Received on Thu Dec 18 2003 - 00:29:26 CST