Winner Donald

Data Analyst

About Me

Winner Donald

I’m a data analyst who enjoys turning messy data into clear, useful insights.I work with SQL, Excel, Power BI, and data visualization tools to clean data, build dashboards,solve real business problems reveal hidden patterns and trends in data. My work focuses on practical analysis, not just making charts look good. I like working on datasets from areas like customer behavior, healthcare, finance, and business performance analysis because they usually come with real-world problems that need clear thinking and attention to detail.

This portfolio showcases my projects across various sectors.

My Projects

Telecom Customer Churn

Telecom-Customer-Churn-Analysis

This project focuses on analyzing telecom customer data to understand why customers are leaving and what the business can do to retain them. I Used Excel for data cleaning, SQL for data analysis and Power BI for visualization.

Documentation
Fraud Risk Dashboard

Fraud-Risk-Transaction-Analysis-Dashboard

This project focuses on analyzing financial transaction data to identify fraud risks, detect suspicious transaction behavior, and understand patterns commonly associated with fraudulent activities. Using PostgreSQL for business analysis, and Power BI for visualization.

Documentation
Customer Behavior Dashboard

Customer-Behavior-Churn-Risk-Analysis-Dashboard

This project focuses on analyzing customer behavior in an e-commerce business to understand why customers engage with the platform but fail to convert into buyers, and why some customers eventually stop purchasing. Using Excel for data cleaning, PostgreSQL for business analysis, and Power BI for visualization,.

Documentation
Global Cancer Dashboard

Global-Cancer-Analysis

This project focuses on analyzing global cancer data to understand where preventable deaths are occurring and how healthcare coverage impacts survival outcomes. Using SQL, and Power BI, I explored patterns in cancer cases, deaths, and prevention efforts across countries, regions, and income groups.

Documentation
Ecommerce Customers Dashboard

ecommerce-customer-analysis

This project analyzes an e-commerce transaction data to answer key business questions about revenue performance, customer behavior, and retention opportunities. Using SQL for data extraction and Power BI for visualization.

Documentation

Technical Skills

Data Visualization

  • Power BI
  • Excel Dashboards
  • Interactive Reporting
  • Data Storytelling

Data Analysis

  • SQL
  • PostgreSQL
  • Excel
  • Business Analysis

Business Intelligence

  • DAX
  • Power Query
  • KPI Reporting
  • Trend Analysis

Send me a message

Interested in collaborating or have questions about my work? I'd love to hear from you!