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🧠 SQL Interview Question (Category Contribution % - Tricky) 📌 sales(category, product_id, revenue) ❓ Ques : 👉 For each category, calculate percentage contribution of each product’s revenue withi…

✅ Power BI Scenario-Based Questions 📊⚡ 🧮 Scenario 1: Measure vs. Calculated Column Question: You need to create a new column to categorize sales as “High” or “Low” based on a threshold. Would you u…

Complete step-by-step syllabus of #Excel for Data Analytics Introduction to Excel for Data Analytics: Overview of Excel's capabilities for data analysis Introduction to Excel's interface: ribbons, w…

✅ Data Analyst Mistakes Beginners Should Avoid ⚠️📊 1️⃣ Ignoring Data Cleaning • Jumping to charts too soon • Overlooking missing or incorrect data ✅ Clean before you analyze — always 2️⃣ Not Pr…

Pandas cheat sheet Use the following Pandas cheat sheet to quickly reference some of the most common operations you might perform with the Pandas library. More: https://www.coursera.org/resources/pa…