GeekInterview.com
   Home |  Tech FAQ  |   Interview Questions |  Placement Papers |  Tech Articles |  Learn |  Freelance Projects |  Online Testing |  Geeks Talk |  Job Postings |  Knowledge Base | Site Search |  Add/Ask Question

GeekInterview.com  >  Interview Questions  >  Data Warehousing
Go To First  |  Previous Question  |  Next Question 
 Data Warehousing  |  Question 48 of 92    Print  
If you source data from a system that you (warehouse team) have no authority to enforce data quality at the source level, how do you handle this? Do you apply data validation just after you stage the data? Or do you enforce it at the “end” of the flow (typically as you’re pushing it into the data mart)? Or do you not enforce validation at all?

  
Total Answers and Comments: 2 Last Update: March 17, 2007     Asked by: sreya 
  
 Sponsored Links

 
 Best Rated Answer

No best answer available. Please pick the good answer available or submit your answer.
November 09, 2006 13:26:58   #1  
ambuji david        

RE: If you source data from a system that you (warehou...
the position is challenging and need in depth knowledge in answering questions related to this branch of IT
 
Is this answer useful? Yes | No
March 17, 2007 05:23:29   #2  
Nitin        

RE: If you source data from a system that you (warehou...
One of the main purpose of Datawarehousing is to get Cleanse data.
So skipping data validatons is not a good idea.
It will be better to bring the data to a staging area and perform validations.
Or while pushing data from the source we can perform data validations.

 
Is this answer useful? Yes | No

 Related Questions

Latest Answer : Validation Strategies Data validation strategies are often heavily influenced by the architecture for the application. If the application is already in production it will be significantly harder to build the optimal architecture than if the application ...
Read Answers (1) | Asked by : rajanikanth

How can one transfer LOB and user defined data from oracle to warehouse using ETL informaticabecause whenever u select the source data in informatica it shows it can take only character data
Read Answers (2) | Asked by : tapas

What is the difference between database and data warehousing?What is the main advantages of data warehousingWhat is mean by data stageWhat is the famous tools used for data warehousing?What is the architecture of data warehouisng model?
Read Answers (14) | Asked by : s.Narasimma subramanian

Hi I urgently need some precise infos to the following questions..What kind of data will be stored in a big mortgage company data warehouse?What is the size of tables(number of row, column), number of records?Also how do you conduct a dta warehouse testing? steps of warehouse testing?Thanks
View Question | Asked by : damd

Latest Answer : In DWH loops may exist between the table. If loops exist, then query generation will take more time, because more than one path is available. It creates ambiguity also. Loops can be avoided by creating aliases of the table or by context.. i.e. defining ...
Read Answers (1) | Asked by : lude

Latest Answer : Interview questions for Data Quality Analyst are as follows:1. How can you say there are no duplicate records in Data warehouse?2. Whether the ETL job accepts known accept records?3. What are the Data Quality Tools? e.g. BO Data Quality, First Logic..etc ...
Read Answers (1) | Asked by : sebastian

1).briefly state different between data ware house & data mart?2).How are u going to consolidate customer infromation in dataware house from the three different back end OLTP applications?3).What is meta data?
Read Answers (13) | Asked by : naveenreddi

1. What is galaxy schema?2. How many types of hirarechies in datawarehousing concept level?3. How to test report in Business Objects?
Read Answers (2) | Asked by : devireddyanil

Latest Answer : Core Dimension is a Dimension table which is used dedicated for single fact table or Datamart. Conform Dimension is a Dimension table which is used across fact tables or Datamarts. ...
Read Answers (2) | Asked by : srinath

Latest Answer : Hierarchical level of datawarehousing is nothing but the concept of generalization and specialization.As we move up the hierarchy the data is more generalized for ex : the location where STATE is more genarilized for of locationAs we move down the hierarchy ...
Read Answers (2) | Asked by : vvatrapu


 Sponsored Links

 
Related Articles

Breaking up XML into Relational Data

Breaking up XML into Relational Data While the preceding example shows how to construct an XML representation over relational data the example in this section illustrates how you can shred XML data back into relational data This reverse operation can be useful if your application works with relation
 

Querying Data with Oracle XQuery

Querying Data with Oracle XQuery Starting with Oracle Database 10g Release 2 you can take advantage of a full featured native XQuery engine integrated with the database With Oracle XQuery you can accomplish various tasks involved in developing PHP Oracle XML applications operating on any kind of dat
 

Retrieving XML Data

Retrieving XML DataTo retrieve XML data from an XMLType table you can use a SELECT SQL statement just as you would if you had to query a relational table For example to select the employee with the id set to 100 from the employees XMLType table discussed in the preceding section you might issue the
 

Using XMLType for Handling XML Data in the Database

Using XMLType for Handling XML Data in the Database Being an object type XMLType can not only be used to store XML data in the database but also to operate on that data via its built in methods Regardless of the storage model you choose XMLType provides a set of XML specific methods to operate on XM
 

Using Oracle Database for Storing, Modifying, and Retrieving XML Data

Using Oracle Database for Storing Modifying and Retrieving XML Data With Oracle XML DB you have various XML storage and XML processing options allowing you to achieve the required level of performance and scalability One of the most interesting things about Oracle XML DB is that it allows you to per
 

ODP.NET - Techniques to Improve Performance while Retrieving Data

ODP NET Techniques to Improve Performance while Retrieving Data Performance tuning is a great subject in Oracle Volumes of books would not be enough to cover every aspect of performance tuning in Oracle However in this section we will only discuss the fundamental performance techniques while working
 

ODP.NET - Populating a Dataset with a Single Data Table

ODP NET Populating a Dataset with a Single Data Table A dataset is simply a group of data tables These data tables can be identified with their own unique names within a dataset You can also add relations between data tables available in a dataset mosgoogle The following code gives you the details o
 

ODP.NET - Retrieving Typed Data

ODP NET Retrieving Typed Data While retrieving values from OracleDataReader we can extract information available in individual columns of a particular row either by using column ordinal position values or column names mosgoogle Retrieving Typed Data Using Ordinals ODP NET provides data specific enum
 

ODP.NET - Retrieving Data Using OracleDataReader

ODP NET Retrieving Data Using OracleDataReader OracleDataReader is simply a read only and forward only result set It works only if the database connection is open and it makes sure that the connection is open while you are retrieving data As the data that it retrieves is read only it is a bit faster
 

ODP.NET - Fundamental ODP.NET Classes to Retrieve Data

ODP NET Fundamental ODP NET Classes to Retrieve Data To retrieve data from an Oracle database using ODP NET we need to work with a few of the ODP NET classes At this point we will discuss the most fundamental classes available in ODP NET for retrieving data mosgoogle The following is the list of fun
 

Sponsored Links

 




About Us  |   Privacy Policy  |   Terms and Conditions  |   Contact  |   Site Map  |   Add Question  |   Propose Category  |   RSS Feeds  |   Articles Sitemap  |   Site Updates  |   Add Resource

Copyright © 2005 - 2008 GeekInterview.com. All Rights Reserved
Page copy protected against web site content infringement by Copyscape