Data cleaning courses can help you learn techniques for identifying and correcting errors in datasets, handling missing values, and standardizing data formats. You can build skills in data validation, outlier detection, and transforming raw data into a usable format. Many courses introduce tools like Python libraries such as Pandas and NumPy, as well as software like OpenRefine, that support executing data cleaning tasks efficiently and ensuring data quality for analysis.

Johns Hopkins University
Skills you'll gain: Biostatistics, Regression Analysis, Logistic Regression, Statistical Methods, Public Health, Probability & Statistics, Statistical Analysis, Statistical Inference, Statistical Modeling, Predictive Modeling, Statistical Hypothesis Testing, Model Evaluation
★ 4.8 (328) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: NSX-T Network Virtualization, Virtual Networking, Virtualization, Network Architecture, Disaster Recovery, Software-Defined Networking, Network Security, IT Automation, Software-Defined Data Center (SDDC), Firewall, Security Controls, Information Technology Operations, Network Routing, Digital Transformation, Hybrid Cloud Computing
★ 4.7 (464) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: AI Personalization, Generative AI, Personalized Service, Responsible AI, User Feedback, Customer Analysis, Customer Service, Customer experience improvement, AI Integrations, LLM Application, Data Ethics
★ 4.9 (8) · Beginner · Course · 1 - 4 Weeks

National Taiwan University
Skills you'll gain: Programming Principles, Computer Programming, C (Programming Language), Data Structures, C and C++, Program Development, Memory Management
★ 4.8 (370) · Mixed · Course · 1 - 3 Months

Skills you'll gain: Large Language Modeling, LLM Application, Artificial Neural Networks, Deep Learning, Artificial Intelligence and Machine Learning (AI/ML), Generative AI, Generative Model Architectures, Natural Language Processing, Fine-tuning, Model Training, Transfer Learning
★ 3.2 (9) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Image Analysis, Image Quality, Matlab, Computer Vision, File I/O, Automation, Digital Signal Processing, Anomaly Detection, Spatial Data Analysis, Geospatial Information and Technology, Engineering Practices, Medical Imaging, Spatial Analysis, Mathematical Software, Data Preprocessing, Quantitative Research, Algorithms, File Management, Data Store
★ 4.7 (257) · Beginner · Specialization · 1 - 3 Months

Google Cloud
Skills you'll gain: Google Workspace, File Management, Collaborative Software, Document Management, Data Sharing, Productivity Software, Shared Media, Cloud Storage, File Systems, Business Software, Content Management, Organizational Skills, Data Management, Identity and Access Management, Role-Based Access Control (RBAC)
★ 4.7 (361) · Beginner · Course · 1 - 3 Months

University of Colorado System
Skills you'll gain: Local Area Networks, Network Protocols, Computer Networking, Network Architecture, TCP/IP, Network Performance Management, General Networking, Network Engineering, Wireless Networks, Telecommunications, Digital Communications
★ 4.7 (538) · Mixed · Course · 1 - 3 Months

Universidad Nacional Autónoma de México
Skills you'll gain: Journalism, Research, Investigation, Media and Communications, digital literacy, Writing, Interviewing Skills, Data Security, Report Writing, Community Outreach, Public Affairs, Cybersecurity, Storytelling, Ethical Standards And Conduct, Fraud detection, Diversity Awareness, Editing
★ 4.9 (668) · Beginner · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Statistical Hypothesis Testing, Biostatistics, Sampling (Statistics), Statistical Methods, Statistical Inference, Scientific Methods, Quantitative Research, Epidemiology, Public Health, Analysis
★ 4.8 (659) · Beginner · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Research Design, Institutional Review Board (IRB), Science and Research, Laboratory Research, Research Methodologies, Research, Consumer Behaviour, Sensory Systems Analysis, Influencing, Marketing Psychology, Case Studies, Persuasive Communication, Statistical Analysis, Psychological Evaluations, Ethical Standards And Conduct, Data Analysis, Data Collection, Advertising, Behavioral Economics, Marketing Communications
★ 4.5 (45) · Intermediate · Specialization · 3 - 6 Months

Illinois Tech
Skills you'll gain: Capital Budgeting, Microsoft Excel, Dashboard, Financial Modeling, Dashboard Creation, Business Intelligence, Data Visualization, Key Performance Indicators (KPIs), Productivity Software, Excel Formulas, Spreadsheet Software, Data Presentation, Interactive Data Visualization, Performance Measurement, Business Metrics, Financial Analysis, Data-Driven Decision-Making, Google Sheets, Financial Data, Microsoft Office
★ 4.7 (70) · Intermediate · Course · 1 - 3 Months