ksqlDB 0.26 has been released with several key improvements, including enhancements to aggregate functions, JOINs, and schemas. The new release extends the MIN and MAX aggregates to natively support DATE, TIME, and TIMESTAMP types, making it easier for users to perform aggregations without extra casting. Additionally, ksqlDB now supports Stream-Stream and Table-Table RIGHT OUTER JOINs, allowing for more flexible data joining capabilities. The release also improves schema management with enhanced Protobuf schema support, enabling the definition of multiple schemas within a single schema definition. Furthermore, the update includes bug fixes for null-handling improvements and dereferencing null structs. Overall, these enhancements aim to improve the user experience and expand ksqlDB's capabilities in data processing and analysis.