ClickHouse version 22.2 introduces several significant features and improvements, including projections that allow multiple data representations in a single table, control over file creation and rewriting on data export, custom deduplication tokens, DEFAULT keyword for INSERT statements, EPHEMERAL columns, improvements for multi-disk configuration, flexible memory limits, shell-style comments in SQL, and numerous performance optimizations. These features are designed to enhance the performance, flexibility, and scalability of ClickHouse, making it an attractive option for data analysis and management tasks.