ETL Testing

What do you understand by an ETL?Explain the 3-layer architecture of an ETL cycle.What is the difference between and ETL and BI tools?What are the popular ETL tools available in…

To test a data warehouse system or a BI application, one needs to have a data-centric approach. ETL Testing best practices help to minimize the cost and time to perform…

ETL testing is mostly done using SQL scripts and gathering the data in spreadsheets. This approach to perform ETL testing is very slow and time-consuming, error-prone, and is performed on…

Checking Data Completeness is done to verify that the data in the target system is as per expectation after loading. The common tests that can be performed for this are…

Performing data transformations is a bit complex, as it cannot be achieved by writing a single SQL query and then comparing the output with the target. For ETL Testing Data…

In ETL testing, data accuracy is used to ensure if data is accurately loaded to the target system as per the expectation. The key steps in performing data accuracy are…

ETL performance tuning is used to ensure if an ETL system can handle an expected load of multiple users and transactions. Performance tuning typically involves server-side workload on the ETL…

ETL testing covers all the steps involved in an ETL lifecycle. It starts with understanding the business requirements till the generation of a summary report. The common steps under ETL…

It is important that you define the correct ETL Testing technique before starting the testing process. You should take an acceptance from all the stakeholders and ensure that a correct…

An ETL tester is primarily responsible for validating the data sources, extraction of data, applying transformation logic, and loading the data in the target tables. The key responsibilities of an…