About Me

I’m Rolanda, a passionate data analyst with a love for turning raw data into actionable insights. Whether it’s wrangling messy datasets, creating compelling visualizations, or uncovering hidden patterns, I thrive on solving real-world problems using data.

What You'll Find Here

  • Projects: Explore my data-driven projects, from exploratory data analysis to predictive modeling.
  • Skills: Discover my proficiency in Python, SQL, Tableau, Power BI, Ms Excel, data visualization, and statistical analysis.
  • Blog: Dive into my thoughts on data trends, best practices, and industry insights through my medium posts.
  • Contact: Let’s connect! Reach out via email or LinkedIn. I’d love to chat about all things data.
Thanks for stopping by! Feel free to explore, learn, and connect.

My Projects

  • Databel Churn Analysis

    This Power BI project assesses the churn rate for a telecom company, the factors affecting churn, who was churning and avenues to reduce churn.

    GitHub Medium

  • Coffee Shop Dashboard

    This excel project delves into the sales data of a coffee chain in New York city.

    GitHub Medium

  • UK Rail Dashboard

    This Power BI project delves into sales data from the UK train trabsit system to assess consumer behavior and evaluate operational efficiency.

    GitHub Medium

  • Company Layoffs

    In this project, I use SQL to clean and perform exploratory data analysis on company layoff data.

    GitHub Medium

  • Murder Mystery

    In this project, I use SQL to sift through an intricate database to find the perpetrators of a crime.

    GitHub Medium

  • App Impersonator

    This SQL projects depicts what goes on at the backend of a simple diary app when various actions are taken by developers and users.

    GitHub Medium

  • Atlas Labs HR Analytics

    In this Power BI project, I delve into Atlas Lab's HR database and create an interactive and reusable dashboard to help HR better understand staff and assess employee attrition.

    GitHub Medium

  • Educative Course Analysis

    This Excel and Power BI project assesses the performance of various educative subjects and explores opportunities for growth.

    GitHub Medium

  • Student Spending

    This python project dives into the speding habits of college students.

    GitHub Medium

My Tools

From Data Digging and Transformation to Exploratory data analysis and Visualizations, I use these relevant tools to complete the task at hand.

  • Microsoft Excel
  • Power BI
  • Tableau Tableau
  • SQL SQL
  • Python Python

I love Excel for it's versality,quick insights and easy data cleaning. I turn to Excel for quick exploratory data analysis, creating pivot tables, and generating simple visualizations. Its data cleaning capabilities, such as removing duplicates, handling missing values, and transforming data, are invaluable. I enjoy Power BI for it's interactive dashboards,dynamic visualizations and data modeling. I love Tableau for it's beautiful visualizations, emphasis on story telling and it's vibrant community and resources. SQL is great for data retrieval,joins and aggregations and scalability. Python offers me a gallery of libraries and enables me to build custom scripts and automate repetitive tasks. Python is my all-purpose tool.

    Each tool has its strengths, and the best choice depends on the task at hand. Together, they form a powerful arsenal for any data analyst