The dangers of UUID primary keys in SQLite and data optimization

▤ Summary

This article examines the performance and storage tradeoffs of using UUID primary keys in SQLite. It compares INTEGER rowid tables with UUID4 and UUID7 approaches, showing that UUID4 can fragment indexes and slow inserts, while UUID7 improves ordering and insert performance. It also discusses WITHOUT ROWID tables, B-tree behavior, and how byte ordering affects SQLite blob sorting. The piece proposes alternative unique ID strategies and optimization techniques for better write performance and smaller storage overhead.

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