Data Analytics

📦 Subqueries & Nested Queries A subquery is a query inside another query. You can use it in SELECT, FROM, or WHERE clauses to solve complex problems step-by-step. 1. Subquery in WHERE Clause Use this when you need to filter results based on another query.…

🔗 SQL JOINS (INNER, LEFT, RIGHT, FULL, SELF) JOINS help you combine data from two or more tables based on a related column (usually a primary key and a foreign key). 1. INNER JOIN Returns only matching rows between two tables. SELECT customers.name, orders.order_id…

👥 GROUP BY & HAVING Clauses 1. GROUP BY GROUP BY is used to group rows that have the same values in specified columns and apply aggregate functions to each group. Syntax: SELECT column, AGG_FUNC(column2) FROM table_name GROUP BY column; Example: SELECT…

📊 Aggregate Functions (COUNT, SUM, AVG, MIN, MAX) Aggregate functions are used to perform calculations on multiple rows of a table and return a single value. They're mostly used with GROUP BY, but also work standalone. 1. COUNT() Returns the number of rows.…

7 High-Impact Portfolio Project Ideas for Aspiring Data Analysts ✅Sales Dashboard – Use Power BI or Tableau to visualize KPIs like revenue, profit, and region-wise performance ✅Customer Churn Analysis – Predict which customers are likely to leave using Python (Logistic Regression, EDA) ✅Netflix Dataset Exploration – Analyze trends in content types, genres, and release years with Pandas & Matplotlib ✅HR Analytics Dashboard – Visualize attrition, department strength, and performance reviews ✅Survey Data Analysis – Clean, visualize, and derive insights from user feedback or product surveys ✅E-commerce Product Analysis – Analyze top-selling products, revenue by category, and return rates ✅Airbnb Price Predictor – Use machine learning to predict listing prices based on location, amenities, and ratings These projects showcase real-world skills and storytelling with data. Share with credits: https://t.me/sqlspecialist Hope it helps :)

Let’s go to the next topic in our SQL Roadmap! 🔢 SQL Operators (IN, BETWEEN, LIKE, AND, OR) These operators help you build flexible and powerful conditions inside your WHERE clause. 1. IN Operator Used to match multiple values in a column. Example: …

Let’s move on to the next topic in our SQL Roadmap! ✏️ Filtering & Sorting Data (ORDER BY, LIMIT) 1. ORDER BY Clause: ORDER BY is used to sort the result set based on one or more columns — either in ascending or descending order. Syntax: SELECT column1…