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The Best SQL Practice: Real World Interview Questions
76 students
The Best SQL Practice: Real World Interview Questions
Master SQL by solving real-world business problems and technical interview questions
Created byNate Analytics
Last updated 1/2026
English
What you'll learn
- Practice and solve SQL questions which prepare you for data interview questions.
- Sharp your SQL skills by practice SQL basics commands like SELECT, WHERE, GROUP BY, HAVING.
- Master data aggregation using COUNT, SUM, and AVG to analyze business metrics.
- Understand how to reach to SQL questions and how to solve them.
Explore related topics
Course content
4 sections • 15 lectures • 1h 10m total length
Requirements
- Basic knowledge of SQL syntax (familiarity with SELECT, FROM, and WHERE).
- A computer (Windows or Mac) to install the free pgAdmin tool (we will use this for practice).
Description
Do you know the basics of SQL but you feel feel that you lack practical experience? You are not alone. Many beginners understand what SELECT and GROUP BY do, but they struggle to combine them to answer real business questions during technical interviews.
Welcome,
At this course we bridge the gap between theory and practice. We don't just talk about code; we act as Data Analysts for a fictional e-commerce company. We will use PostgreSQL to analyze real-world data, calculate revenue, track the best customers , and find helpful insights in the data.
What will you practice in this course? Based on real interview questions, we will cover:
Business Aggregations: Use COUNT, SUM, and AVG to calculate total orders and revenue per channel.
Advanced Logic: Understand exactly when to use HAVING vs. WHERE to filter complex results.
Customer Analysis: Solve complex scenarios like "Who bought this year but not last year?"
Date Trends: Analyze sales performance by year and month using Date functions.
Window functions
With, Case, Sub queries and all the most advanced and complex SQL methods.
How is the course structured?
We believe in learning by doing. The course is divided into three main parts:
Guided Exercises
Self-Practice
Detailed Solutions
Who is this course for?
Aspiring Data Analysts preparing for technical interviews.
Students and Juniors who want to build a portfolio.
Anyone who wants to move from "learning SQL" to "using SQL."
Enroll today and start building your practical data skills!
Who this course is for:
- Beginners who know SQL theory but lack hands-on practice
- Students looking to bridge the gap between academic learning and real-world business scenarios.
- Anyone pursuing a data career (Data analysts, Bi developers, Data engineers, Data scientists) who wants to prepare for job interviews.