We give ETL testing training online from hyderabad, India from the best renowned trainers of India. Our trainers are professionals with real time experience. Our ETL testing training given online is an added advantage for you, as you can learn many things with practical approach. We deliver advanced training by real time experience.
What is ETL
Data is important for businesses to make the critical business decisions. ETL testing plays a significant role validating and ensuring that the business information is exact, consistent and reliable. Also, it minimizes hazard of data loss in production.
ETL testing is the heart of Data warehouse testing. ETL systems are used by businesses to integrate data from multiple sources. ETL stands for Extract Transformation and Load, It collect the data from various sources such as data from Heterogeneous System (DB), Transform the data into Data warehouse (Target)
ETL Testing Challenges:
ETL testing is quite different from conventional testing. There are many challenges we faced while performing data warehouse testing. Here is the list of few ETL testing challenges
Incompatible and duplicate data.
Loss of data during ETL process.
Unavailability of inclusive test bed.
Testers have no privileges to execute ETL jobs by their own.
Volume and complexity of data is very huge.
Fault in business process and procedures.
Trouble acquiring and building test data.
Missing business flow information.
How ETL Testing works:
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 a unified structure.Later use BI tools to derive meaningful insights and reports from this data. (ex The sales department have stored it by customerÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢s name, while marketing department by customer id. here Datawarehouse to store information in different sources)
Different phases of ETL testing process
Business and Requirement understanding
Test Planning and Estimation
Designing Test Cases and Preparing Test Data
Test Execution with Bug reporting and closure
Summary report and Result analysis
What is covered in ETL testing (Types of ETL Testing)
Each organization categorize testing types are different, The ETL testing strategy build according to their organization level. So every organization maintain their own ETL testing types.Sometimes, for larger projects / programs, it vary from client to client.Generally, the main types of testing that are covered under ETL testing are
Validation testing (source to target data)
Testing for duplicate check
Testing for attribute check
Logical or transformation testing
Incremental and historical data testing
GUI / navigation testing
Data Warehousing concepts:
Levels of testing
Practice sessions on ETL Testing
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