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.

American Psychological Association
Skills you'll gain: Qualitative Research, Interviewing Skills, Case Studies, Research, Research Methodologies, Data Collection, Research Design, Social Sciences, Culture, Psychology, Analytical Skills
★ 4.7 (84) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Cryptography, Security Requirements Analysis, Network Architecture, Network Security, Internet Of Things, Cybersecurity, Web Services, Encryption, Embedded Systems, Network Protocols, Public Key Cryptography Standards (PKCS), Computer Networking, Threat Modeling, Security Controls, Simple Object Access Protocol (SOAP), TCP/IP, Web Applications, Restful API, Information Privacy, OSI Models
★ 4.4 (172) · Intermediate · Course · 1 - 3 Months

University of California, Irvine
Skills you'll gain: Dashboard Creation, Dashboard, Data Visualization Software, Data Presentation, Data Visualization, Business Reporting, SAS (Software), Interactive Data Visualization, Cloud Computing Architecture, Data Storytelling, Business Intelligence, Data Warehousing, Cloud Computing, Cloud Platforms, Big Data, Machine Learning, Data Import/Export
★ 4.1 (31) · Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Drug Development, Clinical Trials, Pharmaceuticals, Clinical Research, Pre-Clinical Development, Pharmacology, Statistical Analysis, Epidemiology, Health Policy, Statistical Methods, Quantitative Research, Data Analysis, Regulatory Compliance, Data Collection
★ 4.8 (39) · Mixed · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Oracle SQL Developer, Oracle Databases, PL/SQL, Database Administration, Relational Databases, SQL, Database Management Systems, Database Architecture and Administration, Stored Procedure, Database Management, Network Architecture, Change Control, Command-Line Interface
★ 4.6 (121) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Data-Driven Decision-Making, Project Performance, Product Improvement
★ 4.8 (31) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Database Design, Database Development, Query Languages, SQL, Database Architecture and Administration, Database Theory, Data Modeling, Database Management, Technical Documentation
Advanced · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Javascript, Ajax, JSON, Web Applications, Web Development, Object Oriented Programming (OOP), Event-Driven Programming, Responsive Web Design, Programming Principles, Prototyping, Network Protocols
★ 4.5 (55) · Mixed · Course · 1 - 4 Weeks

New York University
Skills you'll gain: Cyber Attacks, Infrastructure Security, Mobile Security, Enterprise Security, Cyber Risk, Cyber Governance, Cyber Security Policies, Cybersecurity, IT Security Architecture, Cloud Security, NIST 800-53, Hybrid Cloud Computing, Security Awareness, Security Controls, Risk Management Framework, Blockchain, Internet Of Things, Cryptographic Protocols, Cryptography, Data Integrity
★ 4.7 (683) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: AI Product Strategy, Google Gemini, Product Lifecycle Management, Generative AI, AI Enablement, Product Management, Customer experience improvement, Responsible AI, Data Ethics, Microsoft Copilot, AI Integrations, Ideation, Communication
★ 4.6 (180) · Intermediate · Course · 1 - 4 Weeks

Universidad de Palermo
Skills you'll gain: Online Advertising, E-Commerce, Marketing Strategy and Techniques, Digital Marketing, Digital Advertising, Business Strategy, Social Media Strategy, Google Ads, Advertising, Digital Transformation, Email Marketing, Social Media, Search Engine Optimization, Social Media Marketing, Business Modeling, Social Media Campaigns, Branding
★ 4.7 (259) · Beginner · Course · 1 - 4 Weeks

Peking University
Skills you'll gain: Object Oriented Programming (OOP), C (Programming Language), Programming Principles, Computer Programming, Data Structures
★ 4.9 (827) · Mixed · Course · 1 - 3 Months