What is ETL?
ETL stands for Extract-Transform-Load and it is a process of how data is loaded from the source system to the data warehouse. Data is extracted from an OLTP database, transformed to match the data warehouse schema and loaded into the data warehouse database. Many data warehouses also incorporate data from non-OLTP systems such as text files, legacy systems and spreadsheets.
Let see how it works
For example, there is a retail store which has different departments like sales, marketing, logistics etc. Each of them is handling the customer information independently, and the way they store that data is quite different. The sales department have stored it by customer’s name, while marketing department by customer id.
Now if they want to check the history of the customer and want to know what the different products he/she bought owing to different marketing campaigns; it would be very tedious.
The solution is to use a Data warehouse to store information from different sources in a uniform structure using ETL .ETL can transform dissimilar data sets into an unified structure.Later use BI tools to derive meaningful insights and reports from this data.
- Testers who want to get job on ETL Testing, to get more salary and also who want to get job quickly.
- Who are having very basic knowledge on Database concepts eligible to attend training.
- Graduates in Business Administration are expected to have the knowledge of the ETL training for BI.
- This training is essential for those who are seeking increments and promotions to enhance their skills & to become a professional in database management.