ETL testing courses can help you learn data extraction techniques, transformation processes, and loading verification methods. You can build skills in validating data integrity, creating test cases, and automating testing workflows. Many courses introduce tools like Apache Nifi, Talend, and Informatica, that support implementing ETL processes and ensuring data quality in various applications.

Coursera
Skills you'll gain: Postman API Platform, API Testing, Data Validation, Application Programming Interface (API), Restful API, Verification And Validation, Performance Tuning, Microservices, Performance Testing, Test Tools, Security Controls, Data Integrity, Authentications
★ 4.6 (22) · Intermediate · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: Mental Health, Diversity Awareness, Cultural Diversity, Health Disparities, Social Determinants Of Health, Health Equity, Respiration, Preventative Care, Stress Management, Human Development, Positive Airway Pressure (CPAP/BiPAP), Patient Treatment, Treatment Planning, Diagnostic Tests, Mental Health Diseases and Disorders, Physiology, Child Health, Neurology, Geriatrics, Mindfulness
★ 4.5 (14) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Model Deployment, Dataflow, Data Pipelines, Dashboard Creation, Google Cloud Platform, Data Lakes, Real Time Data, PySpark, Dashboard, Apache Kafka, Tensorflow, Data Governance, Apache Spark, Operational Data Store, Data Warehousing, Data Import/Export, Data Processing, Extract, Transform, Load, Unstructured Data, Big Data
★ 4.4 (58) · Intermediate · Specialization · 3 - 6 Months

Duke University
Skills you'll gain: Rust (Programming Language), Serverless Computing, Command-Line Interface, Maintainability, Amazon Web Services, Linux Commands, Application Deployment, System Programming, Python Programming, Package and Software Management, Performance Tuning, Software Testing
★ 5 (16) · Intermediate · Course · 1 - 4 Weeks

Saïd Business School, University of Oxford
Skills you'll gain: FinTech, Financial Inclusion, Financial Services, Data Sharing, Financial Regulation, Financial Systems, Application Programming Interface (API), Financial Data, Banking, Financial Regulations, International Finance, Law, Regulation, and Compliance, Data Governance, Finance, Interoperability, Design Strategies, Regulatory Requirements, Strategic Thinking, Innovation, General Data Protection Regulation (GDPR)
★ 4.5 (29) · Beginner · Course · 1 - 3 Months

Logical Operations
Skills you'll gain: Microsoft Power Platform, Application Deployment, Application Development, Microsoft 365, Data Modeling, Data-Driven Decision-Making, Project Design, Software Design, Product Planning, Project Planning, Product Testing, Software Development, Software Architecture
Mixed · Course · 1 - 3 Months

Coursera
Skills you'll gain: API Testing, Software Documentation, API Design, Application Programming Interface (API), Technical Documentation, Restful API, JSON, Software Design
★ 4.1 (35) · Beginner · Guided Project · Less Than 2 Hours

Arizona State University
Skills you'll gain: Manufacturing Processes, Process Validation, Production Process, Manufacturing and Production, Laboratory Equipment, Systems Of Measurement, Process Analysis, Process Control, Machine Controls, Materials science, Laboratory Testing
★ 4.9 (26) · Intermediate · Course · 1 - 4 Weeks

Emory University
Skills you'll gain: Laboratory Testing, Specimen Processing, Epidemiology, Infection Control, Public Health, Infectious Diseases, Public Health and Disease Prevention, Healthcare Ethics, Emergency Response, Health Policy, Patient Evaluation, Health Systems, International Relations, Diagnostic Tests, Direct Patient Care, Personal protective equipment, Clinical Practices, Drug Development, Media and Communications
★ 4.7 (222) · Mixed · Course · 1 - 3 Months

University of Maryland, College Park
Skills you'll gain: Pay Per Click Advertising, Data-Driven Marketing, Marketing Analytics, Web Analytics, Search Engine Optimization, Analytics, Paid media, Search Engine Marketing, Web Analytics and SEO, Digital Marketing, Data-Driven Decision-Making, Digital Marketing Tools, A/B Testing, Data Analysis, AI Personalization, Contextual Advertising, Big Data, Customer Analysis, Customer Data Management, Machine Learning
★ 4.5 (11) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Traffic Flow Optimization, Construction Inspection, Building Codes, Construction Engineering, Construction, Construction Management, Civil Engineering, Stormwater Management, General Construction and Construction Labor, Structural Engineering, Hydrology, Hydraulics, Grading (Landscape), Public Works, Design Specifications, Structural Analysis, Materials science, Engineering Plans And Specifications, Engineering Practices, Drafting and Engineering Design
★ 4.6 (31) · Advanced · Specialization · 3 - 6 Months

Google Cloud
Skills you'll gain: Dataflow, Data Pipelines, Site Reliability Engineering, Data Integrity, Performance Tuning, CI/CD, Data Processing, Debugging, System Monitoring, Unit Testing, Application Deployment, Disaster Recovery
★ 3.6 (24) · Advanced · Course · 1 - 3 Months