ClickHouse has added powerful random functions since its 22.10 release, allowing developers to generate realistic test data with high flexibility. These functions include uniform distributions, canonical random, and non-uniform distributions such as normal and Poisson distributions. The random functions can be used to populate tables with test data, generating time-distributed data, values that depend on time, and even multi-modal distributions. Additionally, the functions can be used to generate binary states, random strings, and noisy data, making it possible to simulate real-world data in a controlled environment. By using these functions, developers can create realistic datasets for testing their solutions, reducing the need for manual data generation and increasing the efficiency of development processes.