Introduction

• Characteristics of Data Warehouses:
  • Very large data sizes (e.g., Terabytes)
  • Complex, ad-hoc queries
  • Results delivered interactively

• Two Key Issues:
  • Query performance
  • Storage requirements

• Existing Approaches
  • Precomputation Strategies - answers to known queries are stored
  • Indexing Techniques - fast access to base data allows ad-hoc queries

Introduction

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