What is the fundamental diff between physical standby and logical standby ?

What is the fundamental difference between logical standby and physical standby ?
What if I create a physical standby , now I would like to ask that is it possible to open it on read only mode ? If not , then why not ?
hare krishna
Alok

Nothing will explain you better Oracle than Oracle documentation : 
Standby Database Types 
 
Nicolas.

Similar Messages

What is the exact diff between At New and On Chnage

hello all
what is the exact diff between At New and On Chnage in control breaks statements. and when shall we go for At new & when shall we go for On change on events.
Plz tell with with some code.

Hi ,
Using at new
Each time the value of c changes, the lines of code between at new and endat are executed. This block is also executed during the first loop pass or if any fields to the left of c change. Between at and endat, the numeric fields to the right of c are set to zero. The non-numeric fields are filled with asterisks (*). If there are multiple occurrences of at new, they are all executed. at end of behaves in a similar fashion.
Using the on change of Statement
Another statement you can use to perform control break processing is on change of. It behaves in a manner similar to at new.
The following points apply:
u2022     If the value of any of the variables (v1, v2, and so on) changes from one test to the next, the statements following on change of are executed.
u2022     If no change is detected and else is specified, the statements following else are executed.
on change of differs from at new in the following respects:
u2022     It can be used in any loop construct, not just loop at. For example, it can be used within select and endselect, do and enddo, or while and endwhile, as well as inside get events.
u2022     A single on change of can be triggered by a change within one or more fields named after of and separated by or. These fields can be elementary fields or field strings. If you are within a loop, these fields do not have to belong to the loop.
u2022     When used within a loop, a change in a field to the left of the control level does not trigger a control break.
u2022     When used within a loop, fields to the right still contain their original values; they are not changed to contain zeros or asterisks.
u2022     You can use else between on change of and endon.
u2022     You can use it with loop at it where . . ..
u2022     You can use sum with on change of. It sums all numeric fields except the one(s) named after of.
u2022     Any values changed within on change of remain changed after endon. The contents of the header line are not restored as they are for at and endat.
Regards,
KV

What are advantage and disadvantage for Physical Standy and Logical Standby

HI,
What are advantage and disadvantage for Physical Standy and Logical Standby configuration?
Thanks
Ken

Logical standby database
The key advantage for logical standby databases is that they're opened read/write, even while they're in
applied mode. That is, they can be used to generate reports and the like. It is indeed a fully functional
database. Also, additional indexes, materialized views and so on can be created.
However (this being a disadvantage) not all datatypes are supported.
Oracle (or more exactly the log apply services) uses the primary database's redo log, transforms them into
SQL statements and replays them on the logical standby database.
Physical standby database
A physical standby database is a byte for byte exact copy of the primary database. This also means that
rowids stay the same in a physical standby database environment.
Oracle (or more exactly the log apply services) uses the primary database's redo log to recover the
physical database.
A physical standby database might be opened read only; however, the received logs are in this case not
applied. When the logs are applied, the database is not accessible (it is then in a managed recovery state).
Regards,

What are the major differences between 4.7 and ecc5.0

hi all
What are the major differences between 4.7 and ecc5.0
regards
JK Rao

Hi,
Good morning and greetings,
Please use the following link
http://solutionbrowser.erp.sap.fmpmedia.com
Please reward points if found useful
Thanking you
With kindest regards
Ramesh Padmanabhan

What is the exact difference between Purchse order and purchase requisition

Hi all,
What is the exact difference between Purchse order and purchase requisition.
Thx

Hi,
Purchase Requisition-> Staff in an orgn places Pur requisition for want of some goods/products - ME51
Related Table EBAN
Request for Quotation(RFQ)-> The Purchase dept in the orgn calls/requests for the quotation for the products against which PR was raised. - ME41
Vendor Evaluation->After receving the RFQ's, after comparison a Vendor is finalised based on the terms and conditions.
Purchase Order(PO)-> Pur order was issued to that vendor asking him to supply the goods/products -ME21N
Tables:EKKO,EKPO
Goods Receipt Note(GRN)->Vendor supplies the material/Products to the orgn-
MB01
Goods Issue (GI) -> People receives their respective itesm for which they have placed the Requisitions
Vendor, Material ,Qty are mandatory for PO.
Regards,
Padmam.

What is the perfect defference between AT NEW and ON CHANGE...

What is the perfect defference between AT NEW and ON CHANGE...?

hi vijay,
if u use 'at-new' statement , basically it dont pick first record of the itab where as 'on chage of' can pick from first record.
all these control brake statements can work with header line except 'on change of' event.
regards..
seshu.
Jogdand M B
Hi,
At New.
Effect
Beginning or end of a group of lines with the same content in the component comp1 comp2 ... and in the components to the left of comp1 comp2 .... The components comp1 comp2 ... can be specified, as described in the section Specification of Components, with the limitation that access to object attributes is not possible here.
Example:
LOOP AT itab result ...
    [AT NEW comp1.
     ENDAT.
endloop.
On Change of:
Effect:
The statements ON CHANGE OF and ENDON, which are forbidden in classes, define a control structure that can contain a statement block statement_block. After ON CHANGE OF, any number of data objects dobj1, dobj2... of any data type can be added..
Example:
In a SELECT loop, a statement block should only be executed if the content of the column CARRID has changed.
DATA spfli_wa TYPE spfli.
SELECT *
       FROM spfli
       INTO spfli_wa
       ORDER BY carrid.
ON CHANGE OF spfli_wa-carrid.
ENDON.
ENDSELECT.

What is the main difference between f.13 and f13e

Hi,
What is the main difference between f.13 and f13e.
when clearing the document do they follow deifferent steps in selection?
Thanks,
Sravanthi

Hi,
The reason "Clearing currency" is provided is because you can clear in any currency apart from local currency. For eg if your local currency is INR and Document currency (Invoice) is USD and the customer pays in EUR, you can still clear them with the Clearing currency EUR. On the date of payment, Open items in USD will be converted into Clearing currency EUR as follows: USD to INR and from INR to EUR. (based on exchange rates between USD-INR and INR-EUR).
Jayaram

What is the basic difference between Hyperion Planning and HFM

Hi GURU'S,
what is the basic difference between Hyperion Planning and HFM and when do we choose them.

On a high level the difference is this:
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2. Planning is best for modeling your business, starting from a demand forecast and arriving to capacity planning and finally to financial statements, by utilizing business drivers (non-financial data like volumes, prices, productivity rates etc)
Of course, differences may be analyzed at several levels down to technical, but the discussion may turn out to be too long, yet adding little value to the question: "when do we choose the one over the other". Bear in mind that your requirements may turn out that you need both.

Difference between physical join and logical join

Hi Gurus,
Can anyone tell me what is the difference between physical join and logical join
Thanks,
Chandra

Hi,
A physical join is at the physical layer and defines the join between two physical tables. Logical joins live at the BMM (logical) layer and define a join between two logical tables.
The important differentiation is that at the BMM layer you do not tell the OBIEE server how to do the join, you just tell it that there is a relationship between these two logical entities. When the server comes to this logical join it will use the information in the physical joins and decides how the two logical tables are joined together.
In BMM you use complex joins to establish which logical tables are joined which another, the OBI EE server will go to the physical level to search the physical join to make the query. You can also use physical joins in the BMM to override the join in the physical layer but only in very specific conditions.
If you also set complex join in the physical layer OBI EE won't be able to construct the physical query.
Hope this answers your question.
Award points if helpful.
Thanks,
-Amith.

What are the major differences between UCCX v7 and v8.0.2

Does anyone know of a matrix or document which shows the major differences between UCCX v7 and v8.0.2?
I have looked high and low, even searched this forum, but have not found anything.
I've even looked at release notes in 8.0.2 but couldn't see anywhere that states the changes.
Any help appreciated.

Hi,
I have awarded you both with the 'correct answer'.
I went through, painstakingly, the documents I was linked to above and compared.
In the end the major differences are pretty much what you have outlined here - which is exactly what I wanted.
Thank you both very much.
Cheers,
Brett
PS: Here are the obvious differences I found going thru the documentation I was linked to... (pretty much what you said)
Feature
V7
V8
High   Availability over the WAN (HAoWAN)
No
Yes
Available in   an Appliance Model
No
Yes
Read-only access to Cisco Unified Contact Center Express   database (Informix) with JDBC, ODBC, or Structured Query Language (SQL)
No
Yes
System   Software Configuration
MS Windows Server   2003
Cisco Media   Convergence Appliance Software
System   Software Configuration (client)
XP and Vista
XP, Vista, and Win7
System   Software Configuration (browser based client software)
No
CAD and Workforce   Management
System   Software Configuration (Web 2.0 based client software)
No
QM and AQM
Operating   System
Cisco OEM Windows   Server 2003
Cisco Voice OS

What are the major differences between hana 2013 and 2014 release

Hi Guys,
I am planning to learn sap hana and write certification exam. As sap release new platform 2014, may I know what are the major deference between 2013 and 2014 release or its just enhancement pack on top of 2013.
Please help me....thank you in advance.
Regards,
Tapas

Hi,
Good morning and greetings,
Please use the following link
http://solutionbrowser.erp.sap.fmpmedia.com
Please reward points if found useful
Thanking you
With kindest regards
Ramesh Padmanabhan

What are the major differences between oracle 10g and oracle express 10g

Hi
Can anyone tell, What are the major differences between[b] oracle 10g and oracle express 10g.
Or if you know any URL, then please do let me know.
Advance Thanks
JC

Dear sir,
here it is.
http://www.oracle.com/database/product_editions.html

What is the exact difference between Database Cloning and Database Refresh?

Hi,
Can anybody tel me the exact difference between Database Cloning and Database Refresh?
I Have some conflicts in these topics.
Thanks
Rajesh

Refresh is what it says, "refresh" . You have a main site which would always have the data being inserted into it. There would be another site which would remain some where else . This site needs to be refreshed with the primary site. So you need to do export from the primary, push it to the secondary site and done!
HTH
Aman....

What are the main differences between airport express and extreme?

what are the main differences between the express and extreme base stations.

In addition to Bob Timmons' link the main differences are as follows:
Extreme has a slightly more powerful antenna (might not be true but from experience it seems to be)
Extreme has USB HDD sharing
Express has AirPlay
Extreme has 3 Gigabit ports (don't be confused by Apple's page. Apple states 4 including WAN, 3 without WAN)
Express is smaller
Express has 10/100 Ethernet whereas Extreme has Gigabit

Physical standby and logical standby

Hi,
Why we mention standby_archive_dest and log_archive_Dest in standby init.ora.
bcz there is no activity at physical standby.so why we set two parameters?
what is difference between physical stand by and logical standby?

Hi,
A logical standby database contains the same logical information as the production database, although the physical organization and structure of the data can be different. The SQL apply technology keeps the logical standby database synchronized with the primary database by transforming redo data received from the primary database into SQL statements and then executing the SQL statements on the standby database. This makes it possible for the logical standby database to be open read-write and accessed for queries and reporting purposes at the same time the SQL is being applied to it.
Logical vs Physical Standby database
http://www.orafaq.com/node/957
Regards,
Tom
Edited by: Soli on 19.8.2009 13:48

What is the fundamental diff between physical standby and logical standby ?

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