Computer Science · Data Warehousing
In aggregating trade volumes for a data mart, why might pre-computed summary tables conceptually outperform on-the-fly calculations during peak query loads?
- 1To allow unlimited drill-down without hierarchies
- 2To enforce normalization in summary structures
- 3To reduce computational overhead by storing frequent aggregates✓
- 4To increase data redundancy across all levels
Correct answer
To reduce computational overhead by storing frequent aggregates
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