Data Analyst Interview Preparation 2026 — Free SQL, Python & Case Study Guides
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Free Interview Preparation • 2026

Master SQL & Python for
Data Analyst Interviews

Structured guides, real company questions, worked examples, and a live SQL compiler — all completely free, no signup required.

✓ SQL from basics to window functions ✓ Python, Pandas & NumPy ✓ Questions from Google, Amazon, Flipkart ✓ Live SQL compiler in your browser
Start with SQL → Python Guide
50+
Real company questions
8
Core SQL topics
20+
Python guides
Free
No signup needed
Learn by Topic

What you will find here

Every topic is covered with clear explanations, code examples, and practice questions — the way a practitioner would explain it, not a textbook.

🗄
Most Important
SQL for Data Analysts
SELECT, JOINs, GROUP BY, window functions, CTEs — every topic tested in interviews, with worked examples and 50+ real questions.
Start learning →
🐍
Essential
Python for Data Analysis
Pandas, NumPy, Matplotlib, Seaborn — the complete Python toolkit explained for interview contexts with real code examples.
Start learning →
📊
Senior Roles
Case Study Interviews
Business frameworks, A/B testing, metrics analysis — structured guides for the analytical thinking rounds at product companies.
Explore cases →
🎯
Practice
100+ Interview Questions
Real questions from Google, Amazon, Flipkart, Swiggy, and Paytm — with complete written solutions for every question.
See all questions →
📝
Career Prep
Resume & Storytelling
How to present your projects, structure your resume, and answer behavioural questions clearly using the STAR method.
Build your resume →
⌨
Hands-on
Live SQL Compiler
Write and run real SQL queries directly in your browser. Pre-loaded with interview datasets. No account or setup needed.
Practice now →
Recommended order

How to use this site

Work through these topics in order. Each one builds on the previous. Most people reach interview-ready level in 4–6 weeks at 1–2 hours per day.

1
SQL Basics — SELECT, WHERE, ORDER BY
The foundation. Every SQL query starts here.
Beginner
2
GROUP BY & Aggregate Functions
COUNT, SUM, AVG, HAVING — used in almost every interview question.
Beginner
3
SQL JOINs — All Four Types
INNER, LEFT, RIGHT, FULL OUTER with real worked examples.
Intermediate
4
Subqueries & CTEs
WITH clauses and nested queries for readable, complex SQL.
Intermediate
5
Window Functions — RANK, LAG, LEAD
The hardest and most-tested topic at senior level interviews.
Advanced
6
Python & Pandas
Add Python to your toolkit — groupby, merge, reshape, and clean.
Beginner
From the Blog

Recent guides

In-depth articles on SQL, Python, career strategy, and interview preparation. Written from real experience.

📊 Data Analyst
SQL vs Python for Data Analysts 2026 — Which to Learn First?
SQL is tested in 95% of analyst interviews. Python in 70%. Here is the exact learning order that gets results faster.
April 22, 2026 • 9 min read
💰 Career
Data Analyst Salary Guide 2026 — Full Breakdown
Pay ranges by experience and location, top hiring companies, and the skills that make the biggest difference to your salary.
April 16, 2026 • 9 min read
📚 SQL
How to Learn SQL in 30 Days — Day-by-Day Plan
30 days is enough if you practice 1–2 hours daily. This is the exact day-by-day sequence that works for interview prep.
April 24, 2026 • 8 min read
About this site

Built by a practitioner, not a publisher

Data Analyst Interview is a free preparation resource created by Prakhar Shrivastava, a working data professional with hands-on experience in SQL, Python, and business analytics. Every guide is written from real interview experience — not generated automatically or copied from textbooks.

The goal is simple: give you the clearest, most practical preparation available, covering exactly what interviewers at top companies actually test. No paywalls, no artificial promises, and no filler content.

Read more about this site →
✓ Written by a practitioner ✓ Updated for 2026 ✓ Free, no paywall ✓ No fake content
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