Is 1 hour a day really enough to master SQL in 30 days?

Yes! The curriculum is engineered around Kiran Kumar's proven 4-step daily rhythm: 1. Goal for the day, 2. Relatable everyday example, 3. Queries with exact results, 4. Try-it-yourself practice task. Small daily steps prevent burnout and build rock-solid muscle memory.

Which SQL database should I use for this program?

You can use either Microsoft SQL Server (SSMS) or MySQL (or PostgreSQL). The curriculum highlights dialect differences — like TOP vs LIMIT, or COALESCE vs IFNULL — so you learn universally portable SQL.

How do the 5 practice days work?

Days 6, 12, 17, 21, and 30 are dedicated practice days. Instead of new theory, you solve real business questions on realistic tables (employees, orders, customers, products). The golden rule is to attempt each problem for at least 15 minutes before looking at the solution.

What is the Day 30 Final Project?

On Day 30, you synthesize everything across all 6 modules to answer 8 executive business questions on a retail shop dataset — covering revenue trends, customer churn, category rankings with window functions, and month-on-month changes with LAG.

GR-SQL-30D · Quality & Engineering

SQL in 30 Days: Zero to Database Mastery

Name: SQL in 30 Days: Zero to Database Mastery
Availability: InStock

The predictable 1-hour-a-day path to database fluency.

The day-by-day SQL masterclass by Kiran Kumar: 30 days, 6 modules, 1 hour a day, and 5 dedicated practice days. Each session follows a proven 4-step rhythm — Goal → Relatable Example → Queries with Results → Try-It-Yourself Task. You progress from your first SELECT to multi-table joins, subqueries, CTEs, and window functions (OVER, RANK, LAG/LEAD), then finish with DDL/DML and a Day-30 Shop Analysis capstone answering 8 executive business questions.

Duration

30 days (1 hour/day)

Hours

1 hr/day

Mode

Daily 1-hour step-by-step sessions

Batch Size

10–15 students

Talk to a Counsellor

Who this is for

Data analysts who want production-grade query skills.
Software developers and QA engineers who touch databases daily.
Freshers building the single most-tested skill in data interviews.
Business professionals who want to answer their own data questions.

Prerequisites

None required — starts from zero.
Every concept is introduced with everyday relatable analogies.
Any laptop — SQL Server (SSMS), MySQL, or PostgreSQL all work.

Primary career path

Database Developer · SQL Specialist · Data Analyst · QA Test Engineer

Outcome

By the end of 30 days you can write interview-grade SQL independently: multi-table joins, correlated subqueries, modular CTEs, and window functions for running totals, rankings, and month-on-month growth — proven on a Day-30 capstone that answers 8 real executive business questions.

Key Takeaways

What you'll walk away with

Master SQL querying in 30 bite-sized, 1-hour daily sessions with real-world examples.

Write complex multi-table joins, subqueries, and Common Table Expressions (CTEs).

Calculate running totals, month-on-month changes, and rankings with Window Functions (OVER, RANK, LAG/LEAD).

Build and modify relational tables with primary keys, foreign keys, and safe transactions.

Solve real business problems independently on realistic datasets (employees, orders, customers, products).

Tooling Ecosystem

The tools you'll master

Domain	Tools
Databases	SQL Server (SSMS)MySQLPostgreSQLDBeaver
Practice Platforms	LeetCode SQLHackerRankSQL 50 study plan
Core Skills	JoinsSubqueriesCTEsWindow functionsDDL/DML
Methodology	Goal → Example → Queries → Try-It rhythm15-minute golden rule

Production Artifacts

Real things you'll ship

Day 30 Shop Analysis Intelligence Engine

A production SQL script answering 8 multi-tier executive questions — revenue by category, top customers, never-ordered products (LEFT JOIN), MoM trends with LAG(), and per-category bestsellers — combining all 6 modules.

30-Day Query Script Repository

A GitHub repository with day-by-day query scripts, documented solutions, and sample output tables — plus schema-building scripts for retail/e-commerce and coaching-institute datasets with constraints.

Certifications

What you'll earn

HackerRank SQL — Gold Badge (5 Stars)

The track drills HackerRank problem sets so you finish with a verified 5-star SQL badge.

LeetCode SQL 50 Study Plan Certification

Structured completion of the SQL 50 list — the standard MNC interview question bank.

PostgreSQL / Microsoft SQL Server Associate — preparation

Dialect-aware training (TOP vs LIMIT, COALESCE vs IFNULL) prepares you for vendor SQL exams.

Detailed Curriculum

6-Phase Curriculum · 30 days (1 hour/day)

The full curriculum — every phase, every module, every project, every reading — is in the downloadable PDF. We keep it out of the web page so it stays in sync with the live cohorts.

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Module 1 — SQL Basics

First Queries to Confident Filtering (Days 1–6)

Module 2 — Aggregation

GROUP BY, HAVING & NULL Logic (Days 7–12)

Module 3 — Joins

Combining Tables (Days 13–17)

Module 4 — Subqueries & CTEs

Query Decomposition (Days 18–21)

Module 5 — Window Functions

OVER, RANK & LAG/LEAD (Days 22–25)

Module 6 — DDL/DML & Capstone

Build, Modify & the Day 30 Shop Analysis (Days 26–30)

FAQs

Questions, answered

Ready to start the SQL in 30 Days: Zero to Database Mastery?

Download the full curriculum, then book a free career audit. We'll tell you if this is the right track for you.

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