What are the difference between ETL and ELT?

Question

Accepted Answer

ETL focuses on extracting, transforming, and loading data in a sequential process, while ELT involves loading data into a target system first and then performing transformations.

ETL: Extract, Transform, Load - data is extracted from the source, transformed outside of the target system, and then loaded into the target system.
ELT: Extract, Load, Transform - data is extracted from the source, loaded into the target system, and then transformed within the target system.
ETL is suitable for traditional data warehouses where data needs to be cleaned and transformed before loading.
ELT is more suitable for modern big data environments where data can be loaded first and transformed later using distributed processing.
ETL requires a separate data staging area for transformation, while ELT eliminates the need for a staging area by leveraging the processing power of the target system.

What are the difference between ETL and ELT?

Top kipi.ai Senior Leader Engineer interview questions & answers

Popular interview questions of Senior Leader Engineer

Top HR questions asked in kipi.ai Senior Leader Engineer