What is ETL in SQL?
ETL stands for Extract, Transform and Load. These are three database functions that are combined into one tool to extract data from a database, modify it, and place it into another database.
What does ETL mean?
ETL stands for “extract, transform, load,” the three processes that, in combination, move data from one database, multiple databases, or other sources to a unified repository—typically a data warehouse.
ETL Tools
- IBM DataStage.
- Oracle Data Integrator.
- Informatica PowerCenter.
- SAS Data Management.
- Talend Open Studio.
- Pentaho Data Integration.
- Singer.
- Hadoop.
How many layers are in the ETL process?
The five layers are data source, ETL (Extract-Transform-Load), data warehouse, end-user, and metadata layers. The rest of this section describes each of the layers.
What is ETL logic?
ETL is a process that extracts the data from different source systems, then transforms the data (like applying calculations, concatenations, etc.), and finally loads the data into the Data Warehouse system. The full form of ETL is Extract, Transform and Load.
What are the layers in ETL?
The five layers are data source, ETL (Extract-Transform-Load), data warehouse, end-user, and metadata layers.
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