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.

University of Colorado System
Skills you'll gain: Open Web Application Security Project (OWASP), Penetration Testing, Metasploit, Security Testing, Security Strategy, Vulnerability Assessments, Cyber Security Assessment, Security Management, Vulnerability Scanning, Cyber Threat Intelligence, Information Systems Security, Exploitation techniques, Security Controls, Data Sharing
★ 4.7 (267) · Beginner · Course · 1 - 3 Months

28DIGITAL
Skills you'll gain: File I/O, Data Structures, Theoretical Computer Science, Algorithms, Memory Management, Graph Theory, Data Access, Performance Tuning
★ 4.6 (60) · Advanced · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Organizational Development, Culture Transformation, Talent Recruitment, Human Resource Management, Management Training And Development, Human Capital, Intercultural Competence, Human Resources Software, Organizational Leadership, People Development, Professionalism, Human Resources Information System (HRIS), Workforce Development, Organizational Change, Staff Management, Employee Engagement
★ 3.8 (87) · Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Health Informatics, Informatics, Health Care, Health Assessment, Healthcare Project Management, Systems Analysis, Business Systems Analysis, Technical Communication, Requirements Analysis, Data Access, Process Modeling
★ 4.8 (67) · Mixed · Course · 1 - 4 Weeks

Universitat Politècnica de València
Skills you'll gain: Seaborn, Pandas (Python Package), Matplotlib, Data Visualization, Data Visualization Software, Plot (Graphics), Statistical Visualization, Exploratory Data Analysis, Data Analysis, Box Plots, Scatter Plots, Descriptive Statistics, Histogram, Data Manipulation, Statistical Analysis, Time Series Analysis and Forecasting, Graphing, Data Wrangling, Data Structures, Python Programming
Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Computer Programming, Object Oriented Design, Development Environment, Programming Principles, Data Structures
★ 4.4 (94) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Convolutional Neural Networks, Tensorflow, Deep Learning, Transfer Learning, Artificial Neural Networks, Image Analysis, Fine-tuning, Model Optimization, Model Training, Computer Vision, Applied Machine Learning, Classification Algorithms, Network Architecture, Data Processing
★ 5 (7) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Operating System Administration, Network Infrastructure, Data Storage, Command-Line Interface, Peripheral Devices, Software Installation, Security Controls, Active Directory, Technical Support and Services, System Configuration
★ 4.7 (65) · Intermediate · Course · 1 - 4 Weeks

Advancing Women in Tech
Skills you'll gain: AI Workflows, Retrieval-Augmented Generation, Business Process Automation, Multimodal Prompts, Prompt Patterns, AI literacy, Generative AI Agents, Productivity, Context Engineering, Document Management
★ 4.8 (26) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Technical Consulting, Technology Solutions, System Implementation, Test Script Development, Test Tools, Test Planning, Solution Delivery, Case Studies, SAP Applications, Technology Roadmaps, Project Implementation, Stakeholder Engagement, System Testing, Peer Review, Stakeholder Communications, Stakeholder Management, Project Closure, End User Training and Support, System Monitoring, Application Deployment
★ 4.7 (99) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Anomaly Detection, MLOps (Machine Learning Operations), Event Monitoring, Continuous Monitoring, System Monitoring, Unsupervised Learning, Model Evaluation, Threat Detection, Statistical Analysis, Model Optimization, Statistical Hypothesis Testing, Trend Analysis, Real Time Data, Statistical Methods, Time Series Analysis and Forecasting
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Google Analytics, Data-Driven Marketing, Marketing Analytics, Web Analytics, Web Analytics and SEO, Data-Driven Decision-Making, Data Literacy, Digital Analysis, Analytics, Analysis, Descriptive Analytics, Performance Analysis, Performance Metric, Performance Reporting
Beginner · Course · 1 - 4 Weeks