Data Warehousing - what is critical column?

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what is critical column?

Total Answers and Comments: 4

Last Update: March 13, 2008 Asked by: murali

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January 29, 2007 01:15:21

Suheer

what is critical column?

Let us take one ex: Suppose 'XYZ' is customer in Bangalore he was residing in the city from the last 5 years in the period of 5yrs he has made purchases worth of 3 laks. Now he moved to 'HYD'. When u update the 'XYZ' city to 'HYD' in ur Warehouse all the puchases by him will show in city 'HYD' only. This makes warehouse inconsistent. So here CITY is the Critical Column. Solution is use Surrogate Key

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January 29, 2007 01:34:15

gssharma_msc

Member Since: January 2007 Contribution: 16

what is critical column?

Let us take one ex: Suppose 'XYZ' is customer in Bangalore hez residing in the city from the last 5 years in the period of 5yrs he has made purchases worth of 3 laks. Now he moved to 'HYD'. When u update the 'XYZ' city to 'HYD' in ur Warehouse all the puchases by him will show in city 'HYD' only. This makes warehouse inconsistent. So here CITY is the Critical Column.Solution is use Surrogate KeySudheer

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February 23, 2007 13:37:22

Anitha

RE: what is critical column?

The columns(granular) that change the values over a perriod of time.

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March 13, 2008 03:53:37

VVM.SP

Member Since: March 2008 Contribution: 7

RE: what is critical column?

It is a column which we when update the OLTP

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