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Data & Analytics · Intermediate

Horizontal Partitioning

Splitting a table by rows into several partitions or tables with the same columns.

Definition

Each horizontal partition holds a subset of rows, for example one per year or region. When partitions are spread across separate servers, it is called sharding.

Example

Orders_2025 and Orders_2026 each holding one year of rows.

Exam tip

Horizontal = split rows; vertical = split columns.

Related terms