# Subsetting Data

> Source: https://docs.synthesized.io/tdk/latest/user_guide/020_guides/subsetting_data/
> For the complete documentation index, see [llms.txt](https://docs.synthesized.io/llms.txt).

Extract a smaller, referentially intact subset of your database for testing.

## Overview

Subsetting reduces database size while maintaining referential integrity. Use subsetting to:

- Create smaller test databases
- Reduce cloud storage costs
- Speed up test execution
- Focus on specific data scenarios

## Topics

- [Subsetting Basics](https://docs.synthesized.io/tdk/latest/user_guide/020_guides/subsetting_data/subsetting)
- [Data Filtering Strategies](https://docs.synthesized.io/tdk/latest/user_guide/020_guides/subsetting_data/data_filtering)

## See Also

- [How Subsetting Works](https://docs.synthesized.io/tdk/latest/user_guide/030_core_concepts/how_subsetting_works)