- World's Largest Collection of Interview Questions
Start Your Own website Now
Sponsored Links

Interview Questions
Our Services

Get 9,000 Interview Questions & Answers in an eBook.

  • 9500+ Pages
  • 9000 Question & Answers
  • All Tech. Categories
  • 14 MB Content

    Get it now !!

    Send your Resume to 6000 Companies

    Question :
    Explain in brief about critical column.
    Category Data Warehousing Interview Questions
    Rating (1.0) By 233 users
    Added on 8/24/2009
    Views 1549
    Rate it!

    A column (usually granular) is called as critical column which changes the values over a period of time.

    For example, there is a customer by name ?Anirudh? who resided in Bangalore for 4 years and shifted to Pune. Being in Bangalore, he purchased Rs. 30 Lakhs worth of purchases. Now the change is the CITY in the data warehouse and the purchases now will shown in the city Pune only. This kind of process makes data warehouse inconsistent. In this example, the CITY is the critical column. Surrogate key can be used as a solution for this.

    Its a column whose values changes overa period of time.

    EX: Person city -- abc warehouse will keeping track of his travelling route, when the users changes his city the data becomes inconsistent since the city has changed, route will be showed under the new city

    Posted by: Ashok    

    Contact Ashok Contact Ashok

    If you have the better answer, then send it to us. We will display your answer after the approval.
    Rules to Post Answers in

  • There should not be any Spelling Mistakes.
  • There should not be any Gramatical Errors.
  • Answers must not contain any bad words.
  • Answers should not be the repeat of same answer, already approved.
  • Answer should be complete in itself.
  • Name :*
    Email Id :*
    Answer :*
    Verification Code Code Image - Please contact webmaster if you have problems seeing this image code Not readable? Load New Code
    Process Verification  Enter the above shown code:*
    Inform me about updated answers to this question

    Related Questions
    View Answer
    What is data cleaning? How can we do that?
    View Answer
    Why is SAS so popular?
    View Answer
    What is XMLA?
    View Answer
    What is Virtual Data Warehousing?
    View Answer
    What is a level of Granularity of a fact table?
    View Answer
    Explain time series algorithm in data mining?
    View Answer
    What are non-additive facts in detail?
    View Answer
    What is snapshot?
    View Answer
    What is the difference between Datawarehousing and Business Intelligence?
    View Answer
    What is active data warehousing?
    View Answer
    What is the difference between view and materialized view?
    View Answer
    What are the possible data marts in Retail sales.?
    View Answer
    What are the different architecture of datawarehouse?
    View Answer
    What is a linked cube?
    View Answer
    What are the methodologies of Data Warehousing.?
    View Answer
    What is degenerate dimension table?
    View Answer
    What is the datatype of the surrogate key ?
    View Answer
    What is VLDB?
    View Answer
    Explain the advanatages of RAID 1, 1/0, and 5. What type of RAID setup would you put your TX logs.
    View Answer
    Name some of modeling tools available in the Market?
    View Answer

    Please Note: We keep on updating better answers to this site. In case you are looking for Jobs, Pls Click Here - Best Freshers & Experienced Jobs Website.

    View ALL Data Warehousing Interview Questions

    User Options
    Sponsored Links

    Copyright ©2003-2015, All Rights Reserved.
    Privacy Policy | Terms and Conditions

    Download Yahoo Messenger | Placement Papers| FREE SMS | ASP .Net Tutorial | Web Hosting | Dedicated Servers | C Interview Questions & Answers

    Testing Articles | Testing Books | Testing Certifications | Testing FAQs | Testing Downloads | Testing Interview Questions | Testing Jobs | Testing Training Institutes

    Cache = 0.046875 Seconds