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#final-query

Real questions. Useful conversations. Find the people who know your stack.

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Guide60.9K views4,925 votes0 replies4,437 following

ClickHouse ReplacingMergeTree for Late-Arriving Event Deduplication

Keep only the latest version of duplicate ClickHouse event rows using ReplacingMergeTree and FINAL, without row-level UPDATE or DELETE.

replacingmergetree

clickhouse final-queryTasadduq Burneyowner34.8K rep · 20 Feb 2026, 08:21 UTC