Hey everyone👋
Check out this article highlighting 14 Major Differences between ETL and ELT
Here are the major highlights from the article:
| Feature | ETL | ELT |
|---|---|---|
| Process Order | After extraction data is transformed and then loaded. | After extraction data is first loaded into the target system and then transformed. |
| Maintenance | Requires similar maintenance as ELT | Requires similar maintenance as compared to ETL but with additional considerations. |
| Cost | Usually costs more | Less expensive and saves on data egress costs as well. |
| Security | It is more secure as compared to ELT as transformation is performed on a separate server | Data transformation is performed in the target server only which is comparatively less secure. |
| Hardware Requirements | Traditional ETL processes require costly hardware. | ELT process is innately cloud-based no extra hardware is required. |
| Support for Data Lake | Not suitable for data lakes. | It is appropriate for data lakes due to the high storage needs. |
| Support for Data Warehouse | It is highly preferred for loading structured data after transformation | It is supported but not preferred because unstructured data is loaded first. |
| Performance | It is preferred when working with small datasets. | It is preferred when working with larger datasets. |
| Data Movement | It requires more movement of data. | It requires less movement of data. |
| Flexibility and Scalability | Addition of new fields after data loading is difficult. | New fields or components can be added very easily even after the data is loaded. |
| Support for unstructured data | It has limited support for unstructured data. | Transformation of unstructured data is easily supported even after loading. |
| Data Latency | It has higher data latency. | It has lower data latency. |
| Data Loss | Chances of data loss are high during the transformation phase | Data loss chances are less as data is loaded first and then transformed. |
| Maturity | It is a traditional approach | It is a modern approach and is evolving with time. |
To learn more about these differences, checkout the full article here⤵️
https://www.sprinkledata.com/blogs/etl-vs-elt