SQL Essentials: From Basic To Advance

Master SQL with PostgreSQL — ideal for data analysts, scientist, engineers, developers & all data-driven professionals

What you'll learn
- Write efficient SQL queries using PostgreSQL to retrieve, filter, join, and aggregate data from relational databases.
- Apply advanced SQL techniques like window functions, subqueries, and CTEs to solve real-world analytical problems.
- Understand and use scenario-based logic to approach business reporting and data-driven decision making.
- Build a complete portfolio project using sales data, along with assignments and quizzes to reinforce practical learning.

Requirements
- No prior SQL experience is required — this course starts from the basics.
- Basic understanding of data (tables, rows, columns) is helpful but not mandatory.
- A computer with internet access to install and run PostgreSQL.
- Willingness to practice and learn through real-world examples and case studies.

Description
This course is a complete, concept-driven journey through SQL using PostgreSQL — from the absolute basics to advanced topics like window functions, subqueries, CTEs, and performance tuning. What sets this course apart is itsscenario-based learning approach: each concept is introduced with real-world context before diving into writing queries. The focus is onclarity and understanding, not just syntax.

You’ll build strong foundations with core SQL concepts like SELECT, JOIN, GROUP BY, and filters, then progress to advanced techniques like ranking, value functions, aggregates over windows, and sales comparisons using real business datasets. The course includessection-wise quizzes, assignments, and a final portfolio-grade projectbased on real-world sales data to solidify your skills.

Whether you're adata analyst, data scientist, backend developer, business intelligence professional, or a student preparing for a data career, this course will help you master SQL not just syntactically, but conceptually.

Each section includes downloadable datasets and all the SQL files used in demonstrations so you can follow along and practice effectively. You’ll also gain the confidence to read, debug, and write complex queries used in actual business reporting.

By the end, you’ll be equipped to solve real-world data problems with clean, optimized SQL — from exploration to insight.

Who this course is for:
- Aspiring data analysts, data scientists, and BI professionals who want to build strong SQL foundations.
- Backend and full-stack developers looking to enhance their database querying and reporting skills.
- Students and recent graduates preparing for careers involving data or analytics.
- Anyone working with data who wants to learn SQL using real-world, scenario-based examples in PostgreSQL.
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