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Monthly Archives: February 2003

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Design Tip #43: Dealing With Nulls In The Dimensional Model

  • Warren Thornthwaite
  • February 6, 2003

Most relational databases support the use of a null value to represent an absence of data. Nulls can confuse both data warehouse developers and users because the database treats nulls differently from blanks or zeros, even though they look like blanks or zeros. This design tip explores the three major areas where we find nulls in our source […]

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  • Dimensional Modeling Tasks
  • Fact Table Core Concepts
  • Dimension Table Core Concepts
  • Advanced Dimension Patterns & Case Studies
  • ETL and Data Quality
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