Extract, Transform, Load (ETL)
What is Extract, Transform, Load (ETL)?
ETL stands for Extract, Transform, Load. It is a process of extracting data from a variety of sources, transforming the data into a format that is usable for the organization, and loading it into a target system, such as a data warehouse or data lake. The goal of ETL is to make it easier for organizations to access, analyze, and report on their data by bringing it all together in one place.
The Extract step involves gathering data from various sources, such as databases, flat files, or external APIs. The data is then cleaned, filtered, and transformed in the Transform step, to fit the structure and format of the target system. This step also includes data validation, and the use of business rules to ensure data quality.
In the Load step, the transformed data is loaded into the target system, where it can be analyzed and used for reporting and decision-making. The ETL process can be automated and scheduled to run on a regular basis, ensuring that the target system always contains the most recent and accurate data.
ETL is important for organizations that need to integrate data from different sources and use it to make better business decisions. Without ETL, organizations would have to manually process and analyze data, which is time-consuming and error-prone.