Data Warehouse/ETL Testing​

Leverage AI to automate the data validation & ETL testing of your Data Warehouse and deliver data quality at speed​

Sg qs data warehouse testing dark

Data quality costs (companies) an estimated $14.2 million annually”

– Gartner

Bad data caused by defects in the ETL process can cause data problems in reporting that can result in poor strategic decision-making. According to analyst firm Gartner, bad data costs companies, on average, $14 million annually with some companies losing as much as $100 million. 

3 Most Common Methods used for Data Warehouse/ETL Testing

  • The #1 method to compare data movement from data sources to a target data warehouse is Sampling, also known as“Stare and Compare”. It is an attempt to verify data by extracting it from source and target stores and dumping the data into 2 Excel spreadsheets and then viewing or“eyeballing” the 2 sets of data for anomalies. Less than 1% of data is usually verified and reporting is manual.
Stare compare
  • The #2 method is a MINUS Query that uses the MINUS operator in SQL to subtract one result set from another result set to evaluate the difference. If there is no difference, there is no remaining result set. If there is a difference, the resulting rows will be displayed. It is inefficient and produces no audit trail or reporting.
Minus queries
  • The #3 method companies employ are homegrown tools, utilities or frameworks to perform ETL Testing. While this may be tailored to and work for a company’s specific needs, they are very expensive to build (think lots of consulting dollars) and maintain.
Rtts software utilities

75% of businesses are wasting 14% of revenue due to poor data quality”

– Experian Data Quality

QuerySurge — The Data Warehouse /ETL Testing Solution

Qs bdt image

QuerySurge is the smart data testing solution that leverages artificial intelligence to speed up and simplify the validation & testing of Data Warehouses and the ETL testing process. QuerySurge ensures that the data extracted from data sources remains intact in the target data warehouse by analyzing and pinpointing any differences quickly.

Point-to-Point Testing. The QuerySurge ETL testing process mimics the ETL development process by testing data from point-to-point along the data warehouse lifecycle and can provide 100% coverage of your data mappings.

Test across 200+ data stores. QuerySurge supports connections to data warehouses and databases, big data and NoSQL data stores, files and APIs, collaboration software, CRMs and ERPs, and accounting, marketing and ecommerce software. See the full list here» 


19.2% of big data app developers say quality of data is the biggest problem they consistently face.”

– Evans Data Corporation

Key Features. Here are some of the key features of QuerySurge:

  • Artificial Intelligence – Leverage AI-powered technology to automatically and quickly create data validation tests, including transformational tests, based on data mappings with our generative AI solution
  • Projects — Multi-project support, assign users and agents, user activity log reports
  • Smart Query Wizards — Create tests visually, without writing SQL
  • Create Custom Tests — Modularize functions with snippets, set thresholds, stage data, check data types & duplicate rows, full text search, asset tagging
  • Scheduling — Run test immediately, at a predetermined date & time or after any event from a build/release, CI/CD, DevOps or test management solution
  • DevOps for Data — API Integration (both RESTful & CLI) with build/release, continuous integration/ETL , operations/DevOps monitoring, test management/issue tracking and more
  • Data Analytics & Data Intelligence — Data Analytics dashboard, Data Intelligence reports, auto-emailed results, Ready-for-Analytics back-end data access
  • Test Management Integration — Out-of-the-box integration with Azure DevOps, IBM RQM, Micro Focus (formerly HP) ALM, Atlassian Jira and any other solution with API access
  • BI Testing — Testing data embedded in Microsoft Power BI, Tableau, SAP BusinessObjects, MicroStrategy, IBM Cognos or Oracle OBIEE
  • Available On-Premises and In-the-Cloud — Install on a bare metal server, virtual machine, any private cloud or in the Microsoft Azure Cloud as a pay-as-you-go service
  • Security — AES 256-bit encryption, support for LDAP/LDAPS, TLS, Kerberos support, HTTPS/SSL, auto-timeout, security hardening and more

For more on QuerySurge features, visit here ⇒

QuerySurge will help you:

But don’t believe us (or our clients). Try it for yourself.
Check out our free trials and great tutorial