SQL Interview Preparation — All Articles
Every SQL article on the site — from basic SELECT to complex window functions. Structured for data analyst interview prep.
Articles ordered from foundational to advanced — follow in order for the fastest prep, or jump to the topic you need.
📗 SQL Basics
SELECT, FROM, WHERE, ORDER BY, LIMIT — the foundations every analyst needs before moving forward.
📘 Aggregation
GROUP BY, HAVING, COUNT, SUM, AVG, MIN, MAX — the most tested SQL skills in data analyst interviews.
📙 JOINs
INNER, LEFT, RIGHT, FULL OUTER — every join type with interview examples from real companies.
📕 Subqueries & CTEs
Correlated subqueries, WITH clauses — the patterns that separate junior from mid-level SQL skills.
🔴 Window Functions
RANK, DENSE_RANK, ROW_NUMBER, LAG, LEAD, SUM OVER — the most asked advanced SQL topic in 2026.
📅 Date Functions
DATE_TRUNC, DATEDIFF, DATE_FORMAT — handling dates for time series and cohort analysis.
🏆 Top Questions
The most-asked SQL questions from Google, Amazon, Flipkart, Swiggy and more — with model answers.
📊 SQL for Analytics
Funnel analysis, cohort queries, retention — SQL patterns used in product and business analytics roles.
🆕 Latest Articles
New SQL content published in 2026 — updated for modern interview formats and cloud warehouses.
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