SQL Mastery for SDET Interviews with Abhijeet Jagtap

Abhijeet Jagtap

Automation Test Lead @ WalletDoc

💳 Payments-domain product company (South Africa)

SQL Mastery for SDET Interviews V0.2 includes

📈 105 → 312 questions with answers

📚 7 → 12 progressive sections

🔥What’s new:

✅ String, date and time zone functions

✅ DML, constraints, transactions and locking

✅ Indexes, EXPLAIN plans and query performance

✅ Data validation and ETL testing (source vs target, SCD checks, API-to-DB verification)

✅ Rapid-fire theory: ACID, isolation levels, normalization, DB testing strategy

1. Every SDET interview I've cracked started the same way:"Open a SQL editor. Let's run through some queries."
2. No whiteboards. No tricks. Just whether you can think clearly under pressure.
3. 📘This 77-page guide is everything I wish I'd had before my first SDET round
4. 300+ SQL questions curated from real interview rounds, organized across
5. 12 progressive sections so you can build confidence one layer at a time.

🧭How I’d use it:

1. Read the question. Hide the answer.
2. Write the query yourself.
3. Run it on sql-practice.com.
4. Read the note. That’s where the interview is won.

✨ WHAT MAKES THIS DIFFERENT

✓ Every question includes the answer AND the "gotcha" — the trap interviewers actually probe (NULL comparisons, ties, NOT IN with NULLs, etc.)

✓ Dialect notes for MySQL, PostgreSQL, SQL Server, and Oracle

✓ Progressive difficulty — start at Q1 and grow to senior-level patterns

✓ Quick cheat-sheet appendix for the night before your interview

✓ Real test-data validation queries you can use on the job

🎯 WHO THIS IS FOR

- Manual testers transitioning to SDET / QA Automation roles

- Junior SDETs preparing for mid-level interviews

- Mid-level SDETs targeting senior or lead positions

- Anyone whose SQL rounds have ever gone sideways

📥 FORMAT

77-page PDF / Word document, instantly downloadable.

Practice every query on sql-practice.com or programiz.com.

By Abhijeet Jagtap

SDET Interview Prep Series