SQL Playground
Master SQL through interactive quests
Free online SQL playground: practice SELECT, WHERE, JOIN, and GROUP BY in your browser with sample data and instant feedback. No install required to start the first challenges.
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SQL Quest Challenges(0/10 completed)
Your First Query
"Welcome, recruit! You've just joined TechCorp as a junior data analyst. Your first task: pull up the employee roster."
Write: SELECT * FROM employees
Key concept: SELECT retrieves data; * means "all columns" and FROM names the table.
Available Tables
Tables
Achievements
First Steps
Complete your first challenge
Getting Started
Complete 3 challenges
Halfway There
Complete 5 challenges
Lucky Seven
Complete 7 challenges
Dedicated Learner
Complete 10 challenges
Dirty Dozen
Complete 12 challenges
Persistent
Complete 15 challenges
Committed
Complete 20 challenges
SQL Expert
Complete 25 challenges
SQL Grandmaster
Complete all 30 challenges
Getting Warmed Up
Earn 50 XP
First Hundred
Earn 100 XP
Double Century
Earn 200 XP
Quarter K
Earn 250 XP
Rising Star
Earn 400 XP
XP Hunter
Earn 500 XP
Three Quarters
Earn 750 XP
XP Collector
Earn 1000 XP
XP Hoarder
Earn 1250 XP
XP Legend
Earn 1500 XP
XP Titan
Earn 1750 XP
XP Champion
Earn 2000 XP
XP Overlord
Earn 2500 XP
XP Master
Earn 3000 XP
XP Deity
Earn 4000 XP
XP Immortal
Earn 5000 XP
Back for More
Maintain a 2-day streak
On Fire
Maintain a 3-day streak
Burning Bright
Maintain a 5-day streak
Week Warrior
Maintain a 7-day streak
Ten Day Terror
Maintain a 10-day streak
Fortnight Focus
Maintain a 14-day streak
Three Week Wonder
Maintain a 21-day streak
Monthly Master
Maintain a 30-day streak
Two Month Titan
Maintain a 60-day streak
Quarter Year Legend
Maintain a 90-day streak
Half Year Hero
Maintain a 180-day streak
SQL Addict
Maintain a 365-day streak
Welcome to TechCorp
Complete your first SQL Quest challenge
Basics Master
Complete all Basics challenges
Filter Pro
Complete all Filtering challenges
WHERE Wizard
Master the WHERE clause
Sort Specialist
Complete all Sorting challenges
ORDER Master
Master ORDER BY and LIMIT
Aggregate Ace
Complete all Aggregation challenges
COUNT Guru
Master aggregate functions
AVG Analyst
Calculate averages like a pro
Advanced Analyst
Complete all Advanced challenges
TechCorp Rising
Complete half of SQL Quest
SQL Quest Champion
Complete all SQL Quest challenges
Case Opened
Start The Data Detective quest
Gathering Evidence
Complete 3 Detective challenges
Hot on the Trail
Complete 5 Detective challenges
Prime Suspect
Complete 7 Detective challenges
JOIN Novice
Complete your first JOIN challenge
JOIN Master
Complete multiple JOIN challenges
INNER JOIN Expert
Master INNER JOINs
LEFT JOIN Expert
Master LEFT JOINs
Clue Finder
Find your first clue
Evidence Collector
Collect all evidence
Master Detective
Solve The Data Detective quest
Case Closed
Complete The Data Detective
Entrepreneur
Start The Startup Founder quest
Seed Round
Complete 3 Startup challenges
Growth Hacker
Complete 5 Startup challenges
Series A
Complete 7 Startup challenges
Revenue Analyst
Complete a revenue analysis challenge
Metrics Master
Master business metrics
Customer Analyst
Analyze customer data
Product Analyst
Analyze product data
Order Analyst
Analyze order data
Growth Expert
Calculate growth metrics
Data-Driven
Make data-driven decisions
Unicorn Founder
Complete The Startup Founder quest
IPO Ready
Complete the final Startup challenge
Curious Mind
Try a challenge from a second quest
Quest Explorer
Complete 3+ challenges from 2 different quests
Triple Threat
Complete challenges from all 3 quests
Quest Hopper
Complete 5+ challenges from each quest
True Completionist
Complete ALL quests 100%
SELECT * Pro
Master the SELECT statement
Column Picker
Learn to select specific columns
Filter Master
Master WHERE clause filtering
Comparison King
Master comparison operators
Sorting Savant
Master ORDER BY
LIMIT Legend
Master LIMIT clause
GROUP BY Guru
Master GROUP BY
SUM Specialist
Master the SUM function
JOIN Journeyman
Learn your first JOIN
JOIN Expert
Master multiple JOIN types
Subquery Starter
Write your first subquery
Speed Demon
Complete 3 challenges in one session
Marathon Runner
Complete 5 challenges in one session
Unstoppable
Complete 7 challenges in one session
Legendary Session
Complete 10 challenges in one session
Night Owl
Practice SQL after midnight
Early Bird
Practice SQL before 7am
Weekend Warrior
Practice SQL on a weekend
Fresh Start
Practice on the first of the month
Perfect Ten
Earn exactly 1000 XP
Double Trouble
Complete 2 challenges with 200 XP
Quarter Done
Complete 25% of all challenges
Halfway Hero
Complete 50% of all challenges
Almost There
Complete 75% of all challenges
Grand Master
Complete 100% of challenges
Editor
Sandbox
Results
Run a query to see results