View uses Materized


Hi all

Just for my goal of learning, I wonder what is the actual use of the materialized view? I went through the oracle documentation, and there, I found that it contains the results of a query and the use of the replication set. See below for more details.

Definition of Doc Oracle

It's database object, and it contains the result set of a query. The From clause in the query contains tables, view and other views materialized. Collectively, these objects are referred to as tables masters or details.

For replication, materialized view allows you to master copies of data remotely on your local node. Copies can be updated with the advanced replication functionality and are read-only without the feature. You can select data from a materialized view as you would a table or a view.

I really appreciate that someone explain to me the uses of the materialized view. Thanks in advance

Concerning

Muzz

Hi Shu,

See http://docs.oracle.com/cd/E11882_01/server.112/e10706/repmview.htm#REPLN003

Why use materialized views?

You can use views materialized to satisfy one or more of the following objectives:

Tags: Database

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    I would better understand the materialized views in Oracle in particular the use of the option: REFRESH QUICKLY ON COMMIT. The oracle database, we care is a PLM application and any of the tables to apply using the primary key constraints. Instead, the application uses a separate schema to store the key values for each object/save in the database. I would use Materialized View to the creation of a data warehouse smart to transfer only the lines that have updated since the last refresh of the warehouse. My understanding of the materialized views you can't define a until and unless you have a primary key constraint. It's fine and understandable.

    Can we have an oracle separate sid something like WSHD - data warehouse and using the database between the main site links - site WSHD always transfer lines that have changed since the last refresh with REFRESH QUICKLY ON COMMIT option? (Note: this is taking into account the fact that a database primary key constraints defined on the paintings of masters.)

    I guess you have to install MV NEWSPAPER tables on the main table and then create a materialized using option QUICKLY ON COMMIT REFRESH view?

    Am I wrong?

    Will there be another option for the transfer of the lines of main tables in the data warehouse in Oracle?

    Thank you very much.

    See you soon.
    Rohan

    Published by: José on 10/01/2009 00:21

    1. you can't define a materialized as ON COMMIT REFRESH in a separate database view. It must be in the database even if it's to refresh commit it.
    See http://hemantoracledba.blogspot.com/2008/06/mvs-with-refresh-on-commit-cannot-be.html

    2. you don't have to have a primary key to set a MV. You can set a MV WITH ROWID (except if you re-create the source table, you need to do a refresh of the MV because ROWID changes).
    See http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_6002.htm#i2063793

    Hemant K Collette

  • Discoverer Viewer using URLS with parameters

    Hello

    I'm calling discoverer viewer by using a URL that has the date setting by using the document in oracle, I've found.

    http://download.Oracle.com/docs/PDF/B13918_03.PDF

    You can check in the chapter 13.5.2

    I followed the doc and built the URL with date setting and on a certain date. When I open the URL, it always asks me to enter the date.

    Can someone help me?




    Thank you
    Gran

    The format is correct, you probably forgot something...
    Here is an example of a link:

    http://:> / discoverer/Viewer? cn = cf_a156 & wbk = URL_TEST_PARAM & wsk = 1 & qp_Creation_date = 1 April 09 '

    the parameter name must be prefixed with "gp_" and the name of the parameter.

  • Reader view using... Help!

    I like to use the player display.

    But the pictures often go a bit blurry. I tried to wait a while to make sure that the page is loaded, but it still happens.

    How can I stop this?

    Thanks in advance.

    Try the safe boot mode.

    Boot mode safe. https://support.Apple.com/kb/PH21875?locale=en_US

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