Partitioning in PostgreSQL is a database optimization technique where large tables are divided into smaller, more manageable pieces called partitions.
Each partition is a subset of the main table’s data, typically based on a specific criterion like range, list, or hash.
For example, a sales table could be partitioned by year, with each year’s data stored in a separate partition. This approach can improve query performance, as the database can skip irrelevant partitions.

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