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How does Z ORDERING enhance data retrieval performance?

General/Othermedium0.2 min readPremium
Frequency
Low
Asked at 1 company
Category
243
questions in General/Other
Difficulty Split
151E|43M|49H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Puma
Key Concepts Tested
partition
Expert AnswerPremium
44 wordsInterview-ready
**What**: Delta OPTIMIZE table ZORDER BY (cols)—physically clusters data. Space-filling curve (Z-order) for multi-column. Rows with similar values colocated. **Why**: Query WHERE date='X' scans fewer files. Combine partition by date + Z-order by user_id. Trade-off: write cost; run OPTIMIZE periodically....
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