Data Analyst Portfolio

Sahadat Ullah
Mollah

I help people finding insights through data.

Sahadat Ullah Mollah
Who I Am

About Me

Hello, I am Sahadat!

Data Analyst with a passion for transforming data into actionable insights. Skilled in SQL, Python, Excel, and Power BI, with a portfolio of hands-on projects demonstrating data cleaning, analysis, visualization, and business reporting.

Experienced in working with modern data tools including Snowflake, Git & GitHub, and Prompt Engineering. Strong focus on extracting meaningful insights from complex datasets and presenting them through clear, impactful dashboards and reports.

Committed to continuous learning, problem-solving, and delivering data-driven solutions that create measurable business value.

Capabilities

Skills

🗄️

Querying & Databases

SQL Snowflake PostgreSQL SQL Server
📊

Cleaning & Visualization

Power BI Excel Pivot Tables DAX Power Query ETL Data Modeling
💻

Programming

Python EDA Pandas NumPy Matplotlib Seaborn
⚙️

Workflow

Git GitHub VS Code Prompt Engineering
My Work

Projects

Sales, Customer, and Product Analysis Using SQL

Business Queries How do sales trends, product performance, and customer behavior evolve over time — and which products, categories, and customers drive the most value for the business?
Key Findings Sales trends, category contributions, and year-over-year comparisons reveal dominant revenue segments. Customer and product reports surface KPIs like recency, average order value, and monthly spend across VIP, Regular, and New segments.
Built With SQL, PostgreSQL, CTE, Window Functions, CASE WHEN, DATE functions, Views for reporting
View in GitHub

Sales Performance Dashboard - Power BI

Business Queries Is global gross profit performance on track compared to the prior year, and how do sales volume and margin trends vary across monthly timelines, product segments, and geographic markets?
Key Findings Global gross profit dropped by $265.29K year-over-year due to a $512.26K decline in sales, despite a 17.05K increase in quantity sold. Profitability was heavily impacted by underperformance in China and Sweden, alongside gross profit margin contractions in the late third quarter and fourth quarter.
Built With Power BI · DAX · Power Query · Conditional Formatting · Treemap · Waterfall Chart · Scatter Chart
View in GitHub

Profit Performance Analysis

Business Queries How does profit performance trend across specific time dimensions, geographic regions, and customer demographics, and which core products or pricing strategies drive the highest financial returns?
Key Findings Based on Dashboard 1.png and Dashboard 2.png, weekdays drive 72% of total profit, while the United States and Australia generate a dominant 62.7% share. Mountain-200 models lead product returns, expensive pricing yields 95.4% of profits, and the 50+ age demographic represents the top contributing consumer segment at 42%.
Built With Excel · XLOOKUP · Pivot Tables · Power Query · Data Cleaning · Bar Chart · Map · VBA Macros · DAX · M Language
View in GitHub

Movie Correlation Analysis

Business Queries What are the primary drivers of box office success, and specifically, how strong is the statistical relationship between a movie's production budget and its global gross earnings?
Key Findings Strong Budget-Revenue Link: A high positive Pearson correlation (exceeding 0.7) confirms that larger production budgets are strongly tied to higher gross earnings.
Votes as a Success Indicator: Public engagement—measured by user vote counts—shows an equally critical correlation with financial success, suggesting audience reception is just as vital as initial investment.
Built With Python · Pandas · NumPy · Matplotlib · Seaborn · Jupyter
View in GitHub
Reach Out

Contact Info

📧
Email
sahadatshihab412@gmail.com
LinkedIn Profile
LinkedIn
Sahadat Ullah Mollah
Github
GitHub
sahadatullah
"

Let's connect and
work together!

Whether you have a dataset that needs a story, a dashboard that needs clarity, or an analyst role that needs filling — I'd love to hear from you. I'm currently open to remote internship and full-time opportunities.

Say Hello