🗄️ SQL — Basics to Advanced

Master SQL.
The #1 Skill Tested in Every Analytics Interview.

In 25 days we will solve 100+ problems from the 10 most asked SQL patterns for any data role — Window Functions, CTEs, Optimisation, and real interview scenarios. Live sessions, real datasets.

25Days
100+Problems
10Interview Patterns
₹999Full Course
🗓️ Next Batch Starts — 17th August  ·  Limited Seats
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Is This For You?

SQL is tested in every analytics, data engineering, and business intelligence interview. This course covers exactly what gets asked.

📊
Aspiring Data Analyst

SQL is your most-used tool every single day. Learn it properly — from SELECT to Window Functions — before your first interview.

⚡
Working Professional

You write basic queries but struggle with Window Functions, CTEs, or optimisation. Fill the gap in 25 structured days.

🎯
Interview Prepper

Appearing for DA or DE roles in the next 1–3 months? SQL rounds are unavoidable. Practice 10+ real patterns with solutions.

Module 1 · Days 1–8

SQL Basics — SELECT, Filters, JOINs & Aggregations

Everything a beginner needs. Write real queries from Day 1 — filter, sort, join tables, aggregate, and understand how databases actually work.

🗄️ 8 Days📅 16 hrs Live🎯 Beginner → Confident
🗄️ SQL Basics Days 1–8 📅 View Day-by-Day Plan ▼
From Zero to Writing Real Queries

Setup, SELECT, WHERE, ORDER BY, JOINs, GROUP BY, HAVING — the full SQL foundation in sequence.

D1
Database Setup & First QueriesInstall MySQL/PostgreSQL, create your first database, run SELECT, understand schemas and data types
D2
WHERE, AND, OR, NOT, LIKEFilter rows with conditions, string pattern matching with LIKE, NULL handling with IS NULL / IS NOT NULL
D3
ORDER BY, LIMIT, DISTINCTSort results, limit rows returned, deduplicate with DISTINCT — foundation of every report query
D4
Aggregate Functions — COUNT, SUM, AVG, MIN, MAXSummarise data across rows, combine with WHERE for conditional aggregation
D5
GROUP BY & HAVINGGroup rows into buckets, filter groups with HAVING — the most-used pattern in analytics queries
D6
INNER JOIN, LEFT JOIN, RIGHT JOINCombine data from multiple tables, understand how join types affect which rows appear in results
D7
FULL OUTER JOIN, SELF JOIN, CROSS JOINHandle unmatched rows from both sides, join a table to itself, generate combinations
D8
Practice Day — Real Dataset Queries10 exercises on a real e-commerce dataset: revenue by category, top customers, monthly trends
Module 2 · Days 9–17

Intermediate SQL — Window Functions, CTEs & Subqueries

The gap between basic SQL users and interview candidates. Window Functions and CTEs are asked in almost every senior analytics interview — learn them properly with 10+ real patterns.

⚡ 9 Days📅 18 hrs Live🎯 Intermediate → Advanced
⚡ Window Functions Days 9–13 📅 View Day-by-Day Plan ▼
Window Functions — The Interview Differentiator

RANK, DENSE_RANK, ROW_NUMBER, LAG, LEAD, running totals — every pattern asked in DA and DE interviews.

D9
OVER(), PARTITION BY, ORDER BY in WindowsHow window functions differ from GROUP BY, apply aggregate functions without collapsing rows
D10
RANK, DENSE_RANK, ROW_NUMBERRank rows within groups, handle ties, the most-asked window function pattern in SQL interviews
D11
LAG & LEAD — Period-over-Period ComparisonsCompare current row to previous/next row — month-over-month revenue, churn detection, growth %
D12
Running Totals, Moving Averages, NTILECumulative SUM, 7-day rolling average, divide rows into quartiles — all with ROWS BETWEEN
D13
Window Function Practice — 10 Real PatternsTop-N per group, deduplication, gap detection, session analysis — real interview scenarios with solutions
📋 CTEs & Subqueries Days 14–17 📅 View Day-by-Day Plan ▼
CTEs, Subqueries & Recursive Queries

Write readable, modular SQL — break complex problems into steps with CTEs, chain subqueries, handle hierarchical data.

D14
Subqueries — Correlated & Non-CorrelatedNest queries inside SELECT, WHERE, FROM — when to use subqueries vs JOINs
D15
Common Table Expressions (CTEs) — WITH ClauseWrite multi-step queries cleanly, chain CTEs, replace nested subqueries with readable logic
D16
Recursive CTEs — Hierarchical DataEmployee org charts, folder trees, graph traversal — recursive CTEs for data with parent-child relationships
D17
CTE Practice — Complex Multi-Step QueriesRetention cohorts, funnel analysis, customer lifetime value — break real analytics questions into CTE chains
Module 3 · Days 18–25

Advanced SQL — Optimisation, Indexing & Interview Prep

Write fast queries, explain your decisions in interviews, and handle the edge cases that separate senior candidates from juniors.

🚀 8 Days📅 16 hrs Live🎯 Advanced + Interview-Ready
⚡ Optimisation Days 18–21 📅 View Day-by-Day Plan ▼
Query Optimisation & Indexing

Understand why queries are slow, read EXPLAIN plans, add the right indexes, and write queries that don't break in production.

D18
EXPLAIN & Query Execution PlansRead EXPLAIN output, understand full table scans vs index seeks, identify slow query causes
D19
Indexes — B-Tree, Composite, CoveringWhen indexes help vs hurt, composite index column order, index on JOIN and WHERE columns
D20
Query Rewriting for PerformanceReplace correlated subqueries with JOINs, avoid SELECT *, push filters early, SARGable vs non-SARGable predicates
D21
Transactions, ACID & Locking BasicsBEGIN/COMMIT/ROLLBACK, isolation levels, deadlocks, when to use transactions in real applications
🎤 Interview Prep Days 22–25 📅 View Day-by-Day Plan ▼
SQL Interview Sprint — Real Patterns & Mock Rounds

4 days of real interview scenarios — retention analysis, funnel drop-off, duplicate detection, and a full mock SQL round.

D22
Interview Pattern Set 1 — Ranking & DeduplicationTop-N per group, find duplicate rows, second highest salary, nth highest value — the classic warm-up set
D23
Interview Pattern Set 2 — Retention & Funnel AnalysisDAU/WAU/MAU, cohort retention, funnel drop-off rates, session analysis — analytics-specific SQL rounds
D24
Interview Pattern Set 3 — Revenue & Business MetricsMoM growth, running totals, YoY comparison, product revenue breakdown — the business case SQL set
D25
Full Mock SQL Interview RoundTimed 45-minute mock round with live feedback — exactly how a real interview feels, with suggested answers
Limited Seats · Live Batch

Enroll in SQL Course

25 structured days, live sessions, real datasets, 10+ interview patterns — everything you need to clear any SQL round.

🗄️ SQL — Basics to Advanced
₹999 ₹1999
Save ₹1000 (50% OFF)
✅ 25 Days · 50+ hrs Live Sessions
✅ Window Functions, CTEs, Optimisation
✅ 10+ Real Interview Patterns
✅ Full Mock SQL Round (Day 25)
✅ Lifetime Recording Access
✅ WhatsApp Group — Zoom links & updates
Login to Enroll

Common Questions

Do I need any prior SQL knowledge?
No. Day 1 starts from database setup and your first SELECT statement. If you've never written a SQL query, you're in the right place.
Which database do we use?
Sessions are taught on MySQL and PostgreSQL — the two most common in Indian companies. SQL syntax is 95% the same across both, and we highlight any differences.
Will this prepare me for analytics and DE interviews?
Yes. The course covers Window Functions, CTEs, optimisation, and 10+ real interview patterns that appear in DA and DE SQL rounds. Day 25 is a full mock interview.
Are recordings available after live sessions?
Yes — lifetime access to recordings. All Zoom links and recording updates are shared in the WhatsApp group you join after enrolling.
Is ₹499 the final price or are there hidden charges?
₹499 is the complete price — no hidden charges, no upsells during the course. One payment, full access.