Question regarding Oracle and Linux on VMware

Hello,
I carefuly read the paper on Oracle and Linux on Your Own VMware and I'm missing a point.
The paper explains how to start a cluster on a single host in a single Linux VM on VMware.
So, there are 2 instances of Oracle 10g DB on the same Linux VM inside VMware. What does allow that?
Is it possible to run 2 instances on any (single) Linux box, or is VMware required? If VMware is not required, why this complication in that paper? If VMware is required, what does it bring that make running 2 cluster instances on the same host possible?
Many thanks for your help.

userLynx wrote:
I have an oracle database (10.2) and I have a query that needs to compare data on the Oracle database to data on a MS SQL server DB. I'm using a DB Link between the two databases.
How would I compare the date fields?
I have a table that has a date as one of the fields and I need to restrict the records where the date is equal to the date on SQL, however the formats are different:
My query is as follows:
SELECT mkt_css_name,
pmv_rqst_corp_id,
pmv_rqst_source,
'G',
pmv_css_acct_no,
eq.start_date
FROM power_move@cmdt,
enroll_que@tcis eq,
marketer@cmdt
WHERE eq.css_account_number = pmv_css_acct_no
AND eq.requestor_type = 'P'
AND eq.status IN ('A','P','G','S')
AND eq.marketer_id = mkt_seq_no
AND pmv_service_type IN ('G','D')
And Pmv_Gas_Mktr_No = Eq.Marketer_Id
AND pmv_received_timestamp= eq.enroll_date ;
The problem is that the date is stored in Oracle in the following format: DD-MON-YYYY and in SQL as 'YYYY-DD-MM HH:MI:SSSSSS'
for example: Data in Oracle would be 27-JAN-2012 and in SQL as 2012-01-27 00:00:00.000
I get an error when I compile.
How do you reconcile the formats when the syntax is different between databases?
Thanks, SeanDATE datatypes do NOT have any "format"
DATE datatype is stored in internal binary notation.
use TO_CHAR to display, present & compare the DATE datatypes

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Edited by: Kishore Guggilla on Oct 31, 2008 9:35 AM

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Jernej Kase wrote:
One of the systems I'll need to virtualize is Oracle db 11g. As far as I understand the oracle DB template only comes with ASM? I would prefer to use LVM. What is the best way to install db into virtual machine without asm? Should I start with EL 5.2 and configure it, or could I somehow use the EL that comes with the template?I would probably start with the standard EL5 template instead. The Database template is designed to automatically configure and provision the database with ASM and would probably take longer to dismantle.
>
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Message was edited by: Matthew Usnick

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Message was edited by: Matthew Usnick

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I see. Many thanxs BalusC. Im using your blog very often, and its very helpfull for me.
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