How learn data warehouse technology

Hi
I am SQL, PLSQL developer and I wish to progress my carrier into Oracle data warehouse technology. Can anyone advice me from Where I can start. What tools do need to learn? Which books/white papers are good for starter?
What is Oracle Warehouse Builder and Business Inelegance?
Thank you in advance
Adi
UK

Check out this Oracle® Database 2 Day + Data Warehousing Guide..............
http://download.oracle.com/docs/cd/E11882_01/server.112/e10578/toc.htm
Cheers
David

Similar Messages

Oracle Development Survey on Data Warehouses: How Does Yours Compare?

At the start of most data warehouse projects, or even during a project, I am sure you as customers try to find answers to the following questions to help you plan and manage your environments:
* Where can I find trend and comparison information to help me plan for future growth of my data warehouse?
* How many cpu's do other customers use per terabyte?
* How many partitions are typically used in large tables? How many indexes?
* How much should I allocate for memory for buffer cache?
* How does my warehouse compare to others of similar and larger scale?
The data warehouse development team, here at Oracle, would like to help provide answers to these questions. However, to do this we need your help. If you have an existing data warehouse environment, we would like to obtain more technical information about your environment(s) by running a simple measurement script and returning the output files to us, here at Oracle. This will allow our developers to provide comprehensive documents that explain best practices and get a better understanding of which features our customers use the most. This will also allow you as Customers, to benchmark your environments compared to other customers environments.
From a Company perspective we are also interested to get feedback on features we have added to the database, are these features used, how are they used etc. For example we are keen to understand:
* Which initialization parameters are most frequently used at what values?
* How many Oracle data warehouses run on RAC? on single nodes?
* Is there a trend one-way or the other, especially as data volumes increase?
* Does this change with newer releases of the database?
All results from these scripts will be held confidential. No customers will be mentioned by name; only summaries and trends will be reported (e.g., X percent of tables are partitioned and Y percent are indexed in data warehouses that are Z terabytes and larger in size. or X percent of Oracle9i and Y percent of Oracle10g data warehouses surveyed run RAC). Results will be written up as a summarized report. Every participating customer will receive a copy of the report.
Terabyte and larger DW are the primary interest, but information on any data warehouse environment is useful. We would like to have as many customers as possible submit results, ideally by the end of this week. However, this will be an on going process so regular feedback after this week is extremely useful.
To help our developers and product management team please download and run the DW measurement script kit from OTN which is available from the following link:
http://www.oracle.com/technology/products/bi/db/10g/dw_survey_0206.html
Please return the script outputs using the link shown on the above web page, see the FAQ section, or alternatively mail them directly to me: [email protected].

969224 wrote:
Hi Guys, just a quick question. when we have a primary key on 4 coloumns and we have, say 20 million rows and we want to add one extra row. How does oracle check whether the data on the primary key is unique to the record being added compared to the 20 million rows. Does it actually compare the record being added to all the rows present in the table?
Edited by: 969224 on May 10, 2013 8:14 AMNot the whole row, it compares the 4 columns in the INDEX against the 4 columns in the new row.

How create oracle data Warehouse

hi master
sir i am use oracle 9i how i creat data Warehouse
and how use oracle portal for net
please give me idea how i start and which woftware i use
thank's
aamir

Do you want to craete a Data Warehouse database or you want to learn on how to design a Data Warehouse ?
Creating a Data Warehouse database is no different than creating an OLTP database, the only thing in mind should be is that DW are mostly read-only, so you should set initialization parameters suiting DW .

How to convert number datatype to raw datatype for use in data warehouse?

I am picking up the work of another grad student who assembled the initial data for a data warehouse, mapped out a dimensional dw and then created then initial fact and dimension tables. I am using oracle enterprise 11gR2. The student was new to oracle and used datatypes of NUMBER (without a length - defaulting to number(38) for dimension keys. The dw has 1 fact table and about 20 dimension tables at this point.
Before refining the dw further, I have to translate all these dimension tables and convert all columns of Number and Number(n) (where n=1-38) to raw datatype with a length. The goal is to compact the size of the dw database significantly. With only a few exceptions every number column is a dimension key or attribute.
The entire dw db is now sitting in a datapump dmp file. this has to be imported to the db instance and then somehow converted so all occurrences of a number datatype into raw datatypes. BTW, there are other datatypes present such as varchar2 and date.
I discovered that datapump cannot convert number to raw in an import or export, so the instance tables once loaded using impdp will be the starting point.
I found there is a utl_raw package delivered with oracle to facilitate using the raw datatype. This has a numbertoraw function. Never used it and am unsure how to incorporate this in the table conversions. I also hope to use OWB capabilities at some point but I have never used it and only know that it has a lot of analytical capabilities. As a preliminary step I have done partial imports and determined the max length of every number column so I can alter the present schema number columns tp be an apporpriate max length for each column in each table.
Right now I am not sure what the next step is. Any suggestions for the data conversion steps would be appreciated.

Hi there,
The post about "Convert Numbers" might help in your case. You might also interested in "Anydata cast" or transformations.
Thanks,

Is there any documentation which throws light on how data aggregation happens in data warehouse grooming? what algorithm exactly it follows in different aggregation type (raw, hourly, daily)?

Is there any documentation which throws light on how data aggregation happens in data warehouse grooming? what algorithm exactly it follows in different aggregation type (raw, hourly, daily)?
How exactly it picks up a specific data value during Hourly aggregations and Daily aggregations?As in How the value is chosen. Does it say averages out or simply picks value at the start of the hour/day or end of the hour/day ??

I'll try one more time. :)
Views in the operations console are derived from data in the operational database. This is always raw data, and typically does not go back more than 7 days.
Reports get data from the data warehouse. Unless you create a custom report that uses raw data, you will never see raw data in a report - Microsoft and probably all 3rd party vendors do not develop reports that fetch raw data.
Reports use aggregated data - hourly and daily. The data is aggregated by min, max, and avg sample for that particular aggregation. If it's hourly data, then you will see the min, max, and avg for that entire hour. Same goes for daily - you will see the
min, max, and avg data sample for that entire day.
And to try clarifying even more, the values you see plotted on the report are avg samples. If you drill into the performance detail report, then you can see the min, max, and avg samples, as well as standard deviation (which is calculated based on these
three values).
Jonathan Almquist | SCOMskills, LLC (http://scomskills.com)

How do you link attributes in data warehouse

I am new to data warehouse and I am trying to get some direction on how tables, data is linked in the data warehouse archieture. For example in a rational database inorder to get data from several tables to print on a report I would have to join tables, or maybe have a unique field in each table that retrieves the information for that record. How does this work in Data Warehousing. I will appreciate some insight on this subject.
thanks

11616,
Welcome to the exciting world of Data Warehousing! The relational concepts you are referring to still apply in data warehousing. There are also dimensional concepts, for the data that has inherent hierarchy. And too much more to mention here.
The following resources are great places to start. They are widely recognized in the industry and are vendor independent:
1. Bill Inmon
http://www.billinmon.com//library/articles/article2.asp#General
2. Ralph Kimball
http://www.rkimball.com/html/articlesfolder/DWfundamental.html
Almost vendor independent:
3. "Oracle9i Data Warehousing Guide Release 2", Chapter 1: "Data Warehousing Concepts".
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96520/concept.htm#43555
Nikolai

ACI Setup - How to Configure Data Warehouse Database - Partitoning

After reading the ACI Install Guide & Data Warehouse documentation, I have some questions regarding how to setup the database:
- Should database partitioning be setup? If so, what tables should be partitioned and what should they be partitioned by?
- Are there any other best practices or tips for setting up & tuning the database?
We are trying to avoid the (painful) situation of having to add partitioning later on; it is much easier to add it up front (if done correctly up front).
Thanks in advance for any advice!

On the tables recommended for partitioning, the partition key is nullable. If ATG inserts a null value into the timestamp column of one of the partitioned tables, we'll receive an ORA-14300 or ORA-14440 error. Oracle isn't able to figure out what partition to map that record to.
Can the columns be changed to NOT NULL? Or, can the application guarantee a nullable value won't be inserted?
Here are some example columns:
ARF_SITE_VISIT.START_VISIT_TIMESTAMP --> TIMESTAMP(6) null
ARF_REGISTRATION.REGISTRATION_TIMESTAMP --> TIMESTAMP(6) null
ARF_LINE_ITEM.SUBMIT_TIMESTAMP --> TIMESTAMP(6) null
ARF_PROMOTION_USAGE.USAGE_TIMESTAMP --> TIMESTAMP(6) null
ARF_RETURN_ITEM.SUBMIT_TIMESTAMP --> TIMESTAMP(6) null
Thanks

How i create oracle9i data Warehouse

hi master
sir i am use oracle 9i with devloper 6i
sir how i create data Warehouse with my 9i data base
please give me step
what software i install
how i use portal
how i create datamart
how create cub
how i connect my oracle 9i with Warehouse
how i show my portal on net
how i import my oracle 9i data in Warehouse
how i create multidimation report for net becuase my other office in other
city
how i import diffrence type data from diffrence type of database
please give me idea how i start and how i get above result
thank's
aamir

You need to have the enterprise version of Oracle DB 9.2.0.2 in order to have DM4J to work fully. It will run on Oracle DB 9.2.0.1 but you would need to install a JMS patch to have the components run successfully. This is better done by just upgrading to 9.2.0.2.
If you have the correct DB then you need to establish a connection to the db using the "ODM" account and password. You can not access data mining in the db other then through this account.
Additionally, all ODM_MTR tables are granted to ODM for access out of the box. If you want more data accessible to ODM you will need to grant these individually.

Installed Data warehouse builder.Not knowin how to proceed.intial problems

hello frds
i installed Oracle datawarehouse builder of 10.2.0.1.0
and when i am clicking the Repository Assistanceit is asking me for "basic or Advanced instal"
i clicked on basic install after dat it is asking me to fill many things like repository name , password,sys name and password an oracle service name etc etc
tell me how can i fill those details
if i am filling those details and click on Next it is showing be Sql exception ..
i have seen many books
but not getting any proper idea
and i already installed oracle 10g
and even oracle backup software
Plz help me with passwords andfilling those details
Is dat any thing related to oracle 10g
Plzz frdss hope u will reply.
i am waiting for a gud answer
Sindhu

contact your local oracle university or oacle learning centre and get some training on owb. But before you undertake any training you might want to be clear on the specifics such as:
Operating system.
Versions of DB and client.
Is there a specific reasons such as data migration from legacy to owb or development of a new dw environemnt.
What BI tool are you planning to use eg, Cognos,OBI EE ,Hyperion,BO etc.
What is typically your source system and how is the data going to be interfaced(frequency , ,data rules etc).
What is the schema architecture, Star or Snowflake.
What DW methodology do you want to use, Kimball or Inmon.
How much data are you going to work with in DW en.
Is it going to be on RAC.
Once you get your specifics right and know what you want you can get the best out of the training otherwise it will be a routine exercise of chasing something without knowing what you want to achieve.
Trust this helps.

How to learn data mining?

Hi
I am an Oracle developer with DBA experience
How can I learn data mining and launch a career as a data miner?

Hi,
You can certainly start by using ODMr and walking through the tutorial.
To be expert in the field, I would suggest going to any of the book sites and searching for books on datmining. You will find alot of material useful in learning about the art of datamining.
Typically it is not just knowledge of datamining techniques that is important, but understanding the domain. If you have experience with domains such as retail or financial, then you should consider studying datamining implementations that target those domains. The more direct benefit you can bring your users the better.
Good luck, Mark

How to Troubleshoot why data is not moving over into the Data Warehouse after Sql Server Agent Job Run

Hello,
Here is my problem:
Data was imported into the staging area. After resolving some errors and running the job, I got the data to move over to the next area. From there, data should be moving over into the DW. I have been troubleshooting for hours and cannot reslove this
issue. I have restarted the sql service services, I have ran a couple packages manually, and the job is running successfully.
What are some reasons why data is not getting into the data warehouse? Where should I be looking?
Your help is greatly appreciated!!

Anything is possible.
So, just to reiterate, running the job manually works, running the scheduled job does not result in errors neither data arriving to the DW, right? And it used to, correct?
If so, the 1st step would be to examine the configuration(s). But not before you inspect the package. Do you have an ability to export it to a file system and open in BIDS?
Arthur My Blog

How do i bring the management pack to data warehouse?

I have been working with Service Manager a lot but this is my first custom management pack in SCOM.
What i am trying to do is Create two classes and create a relationship. Data will be entered in these classes using PowerShell. This classes should be brought to Data Warehouse as well. There is no discovery or monitoring involved. I have sealed the the
ManagementPack.
I created the class and relationship and imported the management pack in SCOM console. Import was successful and i can see the tables are created in the OperationsManager database but i don't see them in the data warehouse.
I don't see any place from where i can force sync the management packs.
Is there something special i have to do to bring these classes to data warehouse?

Hi
scom will not create table for MP in DW. DW is intended for store result of monitors and rules like alerts, performance data,event id,...etc for reporting.
refer below link for more information.
http://blogs.technet.com/b/stefan_stranger/archive/2009/08/15/everything-you-wanted-to-know-about-opsmgr-data-warehouse-grooming-but-were-afraid-to-ask.aspx
Regards
sridhar v

How to reset data Warehouse table

For fixing some mistakes, I'd like to reset the whole Data Warehouse tables ( clear alll data in the tables).
Is there any way to achieve this with DAC client?
Roger

Nothing to worry. We have the option in DAC. Navigate to Tools -> ETL Management -> Reset Data Sources. Give the confirmation text in the dialog box. With this action the refresh dates will become Null for all tables and which causes to do a full load in the next ETL run.

How do I design this in data warehouse?

I am working on building a data warehouse for insurance quote data.
Each quote will have an applicant and can have an optional co-applicant. Each applicant and co-applicant will have prior auto insurance history, prior home insurance history, current auto insurance information and current home insurance information.
So do I create Applicant and Insurance dimensions here?

Hi Ashan,
Just so you know.
I completely reworked our methodology of building data warehouses back in 2012. The new way of building data warehouses is quite different to the old way. The way you listed.
The methodology presentation is on this link.
https://www.youtube.com/watch?v=Df4CgOtrFq8
Video channels are here. http://www.instantbi.com/videos/
Downloads are here: http://www.instantbi.com/company/downloads/
I have been doing BI since 91 and what we have done now is industry leading.
I am an MSDN so we do our development on MSFT first and then deploy where ever our clients want us to deploy.
Best Regards
Peter Nolan

How to create a new data warehouse?

Hi,
I have a set up where multiple SCOM management groups all report to a shared data warehouse database. For various reasons, we need to “unplug” the management groups from this shared resource and give them each their own data warehouse to use (locally, rather
than centrally).
Is there a way of creating a new clean data warehouse without running a full installation? I’m imagined that I could probably put a copy of the existing shared one into each local management group and then use this process (http://technet.microsoft.com/EN-US/library/hh268492.aspx)
to repoint each locally – but it would be nicer to start fresh for each one. Is that possible, is there an installation I can run for JUST the DW elements of the SCOM installation?
Thanks.

Breaking a shared data warehouse configuration into separate data warehouses is really not supported - there is no installation path for this and no guidance available. If you absolutely need to do this, then you are basically stuck with reinstalling the
data warehouse and reporting server for each management group. You will lose all historical reporting in this scenario. Sure, the data can be saved and used elsewhere, but it will not be available as you would expect to see it in the reporting space of the
Operations Console.
Moving the data warehouse as Mai suggested will not solve the problem, and may actually end up in in other problems with retention and reports being unavailable for some instances. I would not suggest moving/copying the existing data warehouse to each management
group.
Jonathan Almquist | SCOMskills, LLC (http://scomskills.com)

How learn data warehouse technology

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