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SQL for QA

SQL for testers: SELECT, filters, NULLs, functions, GROUP BY, joins, subqueries, CTEs, window functions, data changes, constraints and data validation checks, with a live SQL editor on a real practice database in every lesson. A complete, hands-on path from your first test to a production-grade framework.

114
Lessons
13
Sections
13
Practice labs
~40h
Of content
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payment_mismatch.sql
1SELECT o.id, o.total, p.amount
2FROM orders o
3JOIN payments p ON p.order_id = o.id
4WHERE o.total <> p.amount;
5-- 1 row: order 102 was undercharged
1 passedsqlite · 2ms

The method

Built like real QA work, not a video playlist.

Learn

114 focused lessons, each a few minutes long.

Practice

13 hands-on labs in a browser workspace.

Test yourself

13 section assessments plus a final exam.

Prove it

A public, verifiable achievement for recruiters.

What you will learn

  • SQL Foundations for QA: Why QA Engineers Need SQL, How Relational Databases Store Application Data, Tables, Rows, Columns and Data Types
  • Retrieving Data with SELECT: SELECT and FROM Basics, Choosing Specific Columns, Column Aliases with AS
  • Filtering Data with WHERE: The WHERE Clause, Comparison Operators, Combining Conditions with AND, OR and NOT
  • NULLs and Missing Data: What NULL Really Means, IS NULL and IS NOT NULL, Why NULL = NULL Is Not True
  • Built-in Functions: String Functions: UPPER, LOWER, TRIM and LENGTH, SUBSTR, REPLACE and INSTR, Concatenating Text
  • Aggregation and Grouping: COUNT, SUM, AVG, MIN and MAX, COUNT(*) Versus COUNT(column), GROUP BY Fundamentals

Where you will be at the end

  • Complete 13 hands-on practice challenges, one per section (from SQL Foundations for QA to Data Validation for QA)
  • Pass 13 section assessments
  • Build the portfolio project: Project 1
  • Pass the SQL for QA final assessment and add the result to your Skill Passport

Who this course is for

  • Beginners and manual testers starting this skill from scratch
  • Working testers who want to apply it on real projects
  • Anyone preparing for QA interviews that ask about this skill
  • Best if you already have: No database experience needed; Basic understanding of software testing helps

Curriculum

14 sections, one clear path.

LessonPracticeKnowledge checkProjectAssessment
    • Why QA Engineers Need SQL
    • Knowledge check
    • How Relational Databases Store Application Data
    • Knowledge check
    • Tables, Rows, Columns and Data Types
    • Knowledge check
    • Primary Keys and Foreign Keys
    • Knowledge check
    • Meet the QA Shop Practice Database
    • Knowledge check
    • Reading a Database Schema as a Tester
    • Knowledge check
    • SQL Dialects: SQLite, MySQL, PostgreSQL and SQL Server
    • Knowledge check
    • Where SQL Fits in the Testing Workflow
    • Knowledge check
    • Running Your First Query Safely
    • Knowledge check
    • QA Shop Data Exploration: First Look at Customer Accounts
    • Section assessment

Members-only toolkit

Take the course with you

Made from this course's own lessons, quizzes and labs — ready to revise before interviews or use at work.

Course cheat sheet

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Interview Q&A pack

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Lab solutions & hints

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  • Auto-checked labs
  • Capstone portfolio project
  • Timed final exam

Why paid courses

More than a free course: practice, proof and a portfolio

What you getFreeAcademy
Short lessons with examples
Quick checks and certificate
Hands-on labs checked automatically
Section tests and a timed final exam
Portfolio capstone project with milestones
Cheat sheet, interview pack and lab answers to download
Verified skills on your profile and Skill Passport

What Students Are Saying

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SQL for QA: common questions

1.Do I need experience before starting SQL for QA?
No database experience needed. Basic understanding of software testing helps.
2.What can I try for free, and what needs payment?
5 preview lessons are open to everyone. Full access to every lesson, lab and assessment is a one-time payment. The current price, and any offer that is still running, is shown in the access panel on this page and confirmed again at checkout.
3.How long does the course take?
About 40 hours of lessons and labs, fully self-paced. Your progress is saved automatically so you can stop and continue any time.
4.What do I get when I finish?
Passing the final assessment gives you a verifiable achievement page you can share, and the result is added to your Skill Passport.

Finish with proof, not just a certificate PDF.

Pass the final assessment and get a public verification page showing your score, completion date and the skills you demonstrated — ready to share on LinkedIn.