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A data warehouse is a core archive of information that can be examined to help decision-makers become more knowledgeable. Transaction-oriented systems, relational models, and other sources all regularly and continuously feed data into a data warehouse.
DW testing is crucial to ensure data warehouse systems operate accurately and effectively. A data warehouse is tested at three different basic levels:
Data warehouse testing is an all-inclusive process of constructing and executing extensive test cases to verify their accuracy, precision, reliability, and consistency with the organisation’s data framework.
Due to the growing importance of data analytics and the way complex business insights are discovered under the presumption that data is trustworthy, this is essential for modern business.
When data is in flight during extract, transform, and load (ETL) operations, DW testing addresses the entire data pipeline. It is possible to isolate and resolve problem areas by validating data at intermediate stages.
The testing also includes business intelligence (BI) reports and dashboards that use the consolidated data as their source. After all ETL operations are completed, adding this additional layer of validation confirms the quality of the data.
Our unique testing process ETL and DWH/BI includes:
The front-end BI application is typically a desktop, web, or mobile application, as well as a report. This includes analysis tools and online analytical processing (OLAP) reporting. Applications like these make it easy for end users to construct complex queries for accessing data warehouses without knowing complicated programming languages.
End-user reporting is a critical element of any enterprise intelligence project. Report code executes aggregate SQL queries against data marts and/or operational DW tables and displays results in the required format (either in a web browser or on a client application interface).
For each type of report, there are several types of tests to be considered:
We carry out complex data warehouse testing to verify that your DWH supports informed business decisions. DWH testing with Canarys entails the following:
If ETL does not function properly, data can be damaged, wrongfully altered, or lost along the way, resulting in misleading insights and poor business decisions.
Our SQL-experienced testing techs take a data-centric approach, validating data throughout every entry point. We identify duplicates and triplicates, look for missing foreign keys, ensure that the transformation follows your business rules, and confirm that source and target data are consistent.
Maintaining data quality throughout is essential to support well-founded strategic decisions. Data integration in OLAP cubes. We ensure that OLAP operations (roll-up, drill-down, slicing and dicing, pivot) function properly.
Data visualisation in dashboards and reports. Our testing engineers compare the data and format in the DWH, as well as the reports and dashboards, to ensure that they provide reliable information. We also analyse the rendering time of your dashboards and reports to verify that it complies with your specifications.
Our testing engineers conduct comprehensive performance testing (pressure, load, scalability, and long-term stability subtypes). It is to detect potential bottlenecks and ensure that your data warehouse can handle an influx of visitors and/or a growth of data volume from data sources, as well as multiple user types of activity operations simultaneously.
Data warehouses encompass sensitive business information (series of reports on employees and clients, enterprise financial records, partner information, and so on) that must be protected. When performing DWH security testing, our engineers will look for:
Our competent testing specialists will ensure that the data security measures you use to protect your enterprise data proactively, as specified in your security protocols.
Our unique testing process helps us stand out in making our testing solutions the best. Our methodology combines the industry’s best standards and a custom approach based on specific customer needs.
By optimising years of know-how and skills with a touch of technicalities, we solve enterprise challenges like:
Some DWH components mandate industry skills for testing. To ensure your solution is fully functional, our testing engineers apply technical competence in 10+ domains, including retail, healthcare, banking and finance, production, and more.
To tackle this challenge, our DWH testing technicians shortlist data samples to generate high-quality test data. They also perform efficiency testing to ensure that large amounts of data keep up query execution.
Canarys offers testing services to ensure that your DWH is operating correctly, business data is secure and unharmed, and that data is adequately incorporated and described in BI reports required for sound business decisions. To discuss our offerings more, reach out to us now!