ETL / Database Testing

Data integrity and ETL pipeline validation to ensure your data flows accurately, transforms correctly, and lands reliably in every environment.

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Comprehensive ETL & Database QA Coverage

From raw source data to final target state — we validate every transformation, constraint, and reconciliation step in your data pipeline.

ETL Pipeline Validation

We validate every extract, transform, and load step in your pipeline — verifying data moves correctly from source systems to target databases without loss or corruption.

Data Integrity Checks

Row counts, null value checks, duplicate detection, and referential integrity validation — ensuring your data is complete, consistent, and trustworthy at every stage.

Schema & Constraint Testing

We verify that database schemas, primary keys, foreign keys, unique constraints, and data type definitions are correctly enforced across all environments.

Data Transformation Logic

Business transformation rules — aggregations, calculations, lookups, and mappings — are tested systematically to confirm the logic produces the expected output.

Migration Testing

Database migrations are validated before go-live — verifying that all records are correctly migrated, no data is lost, and rollback procedures work as expected.

Performance of Queries

We profile slow queries, missing indexes, and table scans — identifying performance bottlenecks in your database layer before they impact application response times.

Data QA That Goes All the Way to the Source

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Data-First QA Approach

We treat data quality as a first-class concern — validating not just application behaviour, but the accuracy and completeness of the data powering it.

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Pipeline Experts

Our team has hands-on experience with ETL tools like dbt, Apache Spark, Airflow, and custom SQL pipelines — testing at every layer of the data stack.

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Schema Validation

We systematically verify that your database schema matches its specification — catching missing columns, wrong data types, and broken constraints early.

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Migration Safety

We validate every database migration with before-and-after comparisons and rollback testing — so you can deploy schema changes with full confidence.

How We Run ETL & Database Testing

1

Source-to-Target Mapping Review

We study your data mapping documents, transformation rules, and pipeline design to understand exactly what data should flow where and how it should look at each stage.

2

Test Data Preparation

We prepare representative test datasets — including edge cases like nulls, boundary values, and large volumes — to ensure comprehensive pipeline coverage.

3

ETL Run & Validation

The pipeline is executed and we validate outputs at every stage — verifying row counts, transformation results, and target data against source-to-target specifications.

4

Data Reconciliation

Source and target datasets are reconciled record by record — identifying discrepancies, data loss, duplication, or transformation errors that need to be addressed.

5

Report Delivery

A complete data quality report is delivered covering all findings, reconciliation summaries, defect logs, and prioritized recommendations for your data engineering team.

What You'll Receive

Source-to-target validation report
Data integrity test results
Schema & constraint audit
ETL run logs & analysis
Data reconciliation summary
Migration test report

Ensure Your Data Is Always Accurate

Get a free data quality consultation. We'll assess your ETL pipeline and database setup and identify your highest-risk data quality gaps.

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