Tag: ETL

ETL, the abbreviation of extract, transform and load, is the process of moving data from one or more sources to a target system through extraction, transformation and loading. A regular ETL process should stick to the order of extracting data, transforming data and then loading data into the target system (usually a database). The data finally loaded into the database should be the desired result. However, this reasonable order is often changed in the actual execution of the process. ETL becomes ELT or LET, where the source data is loaded to the target database before it is transformed or even