Combining data sources can be achieved manually by copying and inserting data from various sources into a new destination. For more structured and scalable approaches, data blending and the ETL (extract, transform, load) process are commonly used. ETL involves copying data from different sources, standardizing it, and loading it into a unified database. CrateDB simplifies this process by seamlessly integrating various data types and sources without the need for manual synchronization, ensuring efficient data consolidation and management within a single environment. Learn more about data import in CrateDB