Vertical Partitioning
Vertical partitioning is a database design technique that splits a table's columns into multiple separate tables, typically based on access patterns or data characteristics. It aims to improve performance by reducing I/O operations and memory usage, as queries only need to access relevant columns rather than the entire row. This is often used in large-scale systems to optimize read-heavy workloads or manage wide tables with many columns.
Developers should use vertical partitioning when dealing with tables that have many columns, especially if some columns are accessed frequently while others are rarely used, as it can reduce query latency and improve cache efficiency. It is particularly beneficial in scenarios like e-commerce platforms where product details (e.g., name, price) are queried often, but extended attributes (e.g., reviews, specifications) are accessed less frequently. However, it requires careful planning to avoid excessive joins that might negate performance gains.