This is an open-source set of libraries

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What is ETL, who uses it and why

How ETL is used by data analysts
To work with the task described above, two types of solutions are used via the ETL framework. The first of them is stream processing of information. It is also called Stream. To work with stream processing of information, the Apache Ni Fi tool is used.

But Apache Airflow is suitable for working with batch processing. for planning and monitoring work processes. Developed in Python, Apache Airflow helps to form and set up task chains both visually and programmatically, by writing code.

What is ETL, who uses it and why
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How ETL helps data analysts
ERP systems are usually a mess that no one can sort out for years. ETL was created to structure this mess.

The framework's functions include the following actions to clear greece consumer email list away unnecessary garbage and find valuable bits of information:

find random errors that appeared when entering or transferring data, or perhaps those that arose due to bugs;
find differences in reference books and details between related IT systems.
ETL automatically brings all information to a single value system. It provides reliability and ensures data quality for the end user. Using the framework, you can trace from which source data the resulting value was formed.

The following list provides a beginner analyst with knowledge of how an ETL system works:

information is loaded from the selected sources. This procedure is needed to pull information of arbitrary quality into the framework. The main thing at this step is to compare the sums of the received lines. If it turns out that there are more lines in the original system than in Raw Data, then this means that there are errors somewhere;
it is cleared of errors. This step makes it possible to organize the received data and exclude invalid information from it;
the correspondence of data and reference books is determined. Another type of columns is added to the approved table, the number of which is equal to the number of reference books of the CS.