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GeekInterview.com > Interview Questions > Data Warehousing > ETL
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Question: What is a staging area? Do we need it? What is the purpose of a staging area?
Answer:
Answered by Laxmi on 2005-05-13 16:42:53: Staging area is place where you hold temporary tables on data warehouse server. Staging tables are connected to work area or fact tables. We basically need staging area to hold the data , and perform data cleansing and merging , before loading the data into warehouse. |
| August 08, 2005 12:14:12 |
#3 |
| chandru |
Member Since: Visitor Total Comments: N/A |
RE: What is a staging area? Do we need it? What is the purpose of a staging area?
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Staging area is a temp schema used to
1. Do Flat mapping i.e dumping all the OLTP data in to it without applying any business rules.pushing data into staging will take less time becasuse there is no business rules or transformation applied on it.
2. Used for data cleansing and validation using First Logic. |
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