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.

Board Infinity
Skills you'll gain: White-Box Testing, Test Planning, Test Case, Software Testing, Functional Testing, Software Documentation, Test Automation, Software Quality Assurance, Code Review, Test Data, Issue Tracking, Software Technical Review, Quality Assurance, Technical Communication
★ 4.2 (12) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: API Testing, Postman API Platform, OAuth, Application Programming Interface (API), Performance Testing, Security Testing, Software Testing
★ 4.3 (76) · Beginner · Guided Project · Less Than 2 Hours

Board Infinity
★ 4.6 (27) · Beginner · Course · 1 - 4 Weeks
Skills you'll gain: Statistical Hypothesis Testing, Statistical Methods, Sample Size Determination, Statistical Inference, Estimation, Statistics, Probability & Statistics, Statistical Analysis, Microsoft Excel, Excel Formulas, Probability Distribution, Data Analysis
★ 4.8 (1.3K) · Mixed · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: API Testing, Test Script Development, Scenario Testing, Software Testing, Test Automation, Test Tools, Maintainability, User Interface (UI), Security Testing, Test Data, Scalability, Debugging, Code Reusability, Authentications, Compliance Reporting, Automation
★ 4.7 (7) · Intermediate · Course · 1 - 4 Weeks

University of Leeds
Skills you'll gain: Test Case, Software Testing, Software Quality Assurance, Quality Assurance, Verification And Validation, Software Development Life Cycle, Software Development
★ 4.6 (450) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Data Warehousing, IBM Cognos Analytics, Extract, Transform, Load, Database Architecture and Administration, Data Visualization, Database Design, Dashboard Creation, MySQL, Dashboard, Business Intelligence, Database Management, Data Architecture, Data Pipelines, Shell Script, Data Transformation, Business Metrics
★ 4.8 (30) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Extract, Transform, Load, Metadata Management, Data Integration, Data Pipelines, File I/O, Analytics, Databases, Data Management, Java, Database Development, File Management, Debugging, Data Manipulation, Project Design, MySQL, Data Import/Export, Scalability, Software Documentation, Software Installation, Business Requirements
★ 4.8 (13) · Beginner · Specialization · 1 - 3 Months
Skills you'll gain: Data Modeling, Database Design, Extract, Transform, Load, Databases, Data Warehousing, Data Store, Database Systems, Data Pipelines, Business Intelligence, Data Integrity, Data Validation, Performance Tuning, Data Mart, Business Process, Data Management, Data Quality, Data Transformation, Performance Testing
★ 4.7 (733) · Advanced · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Test Planning, Configuration Management, Risk Management
★ 4.8 (28) · Beginner · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Test Planning, Software Testing, Test Tools
★ 3.9 (12) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: COBOL (Programming Language), Debugging, z/OS, Unit Testing, Test Driven Development (TDD), Software Testing, Development Testing
★ 4.4 (133) · Beginner · Course · 1 - 3 Months