* Before ETL tools user writes the extended code for data transformation to data loading.
* ETL makes life more comfortable, and one tool manages all the scenarios of transformation and loading of the data.
Here is the following example where we are using the ETL:
Example : Data Warehousing
ETL is used in data warehousing concept. Here, we need to fetch the data from multiple different systems and loads it in the data warehouse database. ETL concept is used here to extract the data from the source, transform the data, and load it into the target system.
Example : Data Migration
Data migrations are a difficult task if we are using PLSQL. If we want to migrate the data using a simple way, we will use different ETL tools.
Example : Mergers and Acquisitions
In today's time, lots of companies are merging into different MNCs. To move the data from one company to another, the need for ETL concept arises.
