RE: Primary key type selection

From: Winnie Liu <hkitty_at_earthlink.net>
Date: Tue, 16 May 2000 07:42:14 -0700
Message-Id: <10499.105741@fatcity.com>

Colin,

That's right. The number field occupied varies as varchar2. But still, with the same width, it is a lot faster to scan and match a primary key of numbers than a primary key with characters.

Winnie :)

-----Original Message-----
From: root_at_fatcity.com [mailto:root_at_fatcity.com]On Behalf Of Colin.Shaw_at_phs.com
Sent: Monday, May 15, 2000 9:28 PM
To: Multiple recipients of list ORACLE-L Subject: RE: Primary key type selection

>A number field takes less no. of bytes than a varchar2 field.

Not necessarily. A number field occupies a variable number of bytes, depending on its magnitude and number of digits.

Colin.

-----Original Message-----
Sent: Sunday, May 14, 2000 9:14 PM
To: Multiple recipients of list ORACLE-L

Hi,

The first advantage is the space saving. A number field takes less no. of bytes than a varchar2 field. This decrease in storage may positively impact performance...

Regards
Rajagopal Venkataramany

----Original Message Follows----
Reply-To: ORACLE-L_at_fatcity.com
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Date: Sun, 14 May 2000 10:54:12 -0800

Is there any advantages and disadvantages (performance? , ...) between NUMBER and VARCHAR2 for primary key column?

Alex Hillman

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--
Author: Rajagopal Venkataramany
  INET: rajagopalvr_at_hotmail.com

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Received on Tue May 16 2000 - 09:42:14 CDT