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GeekInterview.com > Interview Questions > Data Warehousing > Basics
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Question: What is a Data Warehousing?
Answer: Data Warehouse is a repository of integrated information, available for queries and analysis. Data and information are extracted from heterogeneous sources as they are generated....This makes it much easier and more efficient to run queries over data that originally came from different sources. Typical relational databases are designed for on-line transactional processing (OLTP) and do not meet the requirements for effective on-line analytical processing (OLAP). As a result, data warehouses are designed differently than traditional relational databases. |
| August 08, 2005 01:36:01 |
#2 |
| Praveen |
Member Since: Visitor Total Comments: N/A |
RE: What is a Data Warehousing?
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Datawarehosing is a process of creating,queriring and populating datawarehouse. it includes a number of discrete technologies like
Identifying sources
Process of ECCD, ETL which includes data cleansing , data transforming and data loading to targets.
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