PostgreSQL Table Partitioning: Range, List, Hash, and Zero-Downtime Retention

Learn how to partition large tables in PostgreSQL: when it pays off (and when it does not), RANGE, LIST and HASH partitioning, partition pruning and how to verify it with EXPLAIN, indexes and unique keys on partitioned tables, automation with pg_partman and pg_cron, data retention with DETACH CONCURRENTLY, and how to migrate an existing table with zero downtime. With production-ready SQL and the mistakes that silently defeat partitioning.

25 minutes read

2026-07-31

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