How does ETL differ from ELT?

ETL (Extract, Transform, Load) and ELT (Extract, Load, Transform) are two common processes used in data integration. The primary difference lies in the order of the transformation step. In ETL, data is first extracted from various sources, followed by transformation, and then loaded into the destination system. On the other hand, ELT involves extracting data first, then loading it into the target system, and finally performing transformation on the data within the target system. While ETL is ideal for scenarios where the transformation is complex and requires specialized tools, ELT is more suited for situations where the target system has sufficient compute power and capabilities to handle the transformation. ELT allows for more flexibility as it leverages the target system's processing capabilities, making it particularly advantageous in scenarios where the transformation logic may change frequently.

This mind map was published on 13 February 2024 and has been viewed 81 times.