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Explain the data cleaning, data integration and transformation in detail
written 6.3 years ago by gravatar for prachi.sagar prachi.sagar • 400 modified 2.2 years ago by gravatar for DevarenjiniP DevarenjiniP • 3.1k
data mining and business intelligence
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written 2.2 years ago by gravatar for DevarenjiniP DevarenjiniP • 3.1k

Data Integration

  • Combines data from multiple sources into a coherent store

  • Schema integration: e.g., A.cust-id= B.cust-#

  • Integrate metadata from different sources

■ Entity identification problem:

  • Identify real world entities from multiple data sources, e.g., Bill Clinton = William Clinton

■ Detecting and resolving data value conflicts

  • For the same real …

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