How ETL Works?
The best way to understand the ETL which is the steps of the ETL which are follows:
1. Extract
In ETL basically when you are performing the extraction of the data in that process you are exactly copying or moving raw data to its temporary storage which called staging area. data teams will do this from different places where the data is stored and it can be all well organize or not. the following are the limits of the same
- SQL or NoSQL servers
- CRM and ERP systems
- JSON and XML
- Flat-file databases
- Web pages
2. Transform
In the staging area raw data process through the process which is :
- Filtering, cleaning, combining, removing duplicates, and checking data.
- Calculations, translations, or summery based on the raw data.
- Conduction of audits to check the data quality and compliance, and calculating metrics.
- Removing, encrypting, or securing of data as per rules.
- Formatting the data into tables or combining tables to match the target data warehouse’s structure.
3. Load
In the final step, changed data is transfer from the staging area to a target data warehouse. This will usually starts with loading all data, then regularly adding new changes, and sometimes fully refreshing to replace all the data. ETL processes are less automated, clearly defined, and happen continuous and in batches. actually, this happens during off hours when source systems and the data warehouse have the least activity.
What is ETL (Extract Transform Load)?
In analytics and data integration, ETL is an essential procedure. It involves collecting data out of multiple sources, formatting it uniformly, and then feeding it into a target location like a database or data warehouse. In order to provide organizations with actionable insights and the ability to make well-informed decisions, ETL is essential to the consolidation and preparation of data for analysis.
Table of Content
- What is ETL?
- How ETL evolved?
- ETL VS ELT
- How ETL works?
- ETL and other data Integration methods
- Benefits and challenges of ETL
- ETL tools
- The Future of Integration-API’s using EAI
- Conclusion
- Frequently Asked Questions on What is ETL?