Top 10 SQL & PL/SQL Interview Questions & Answers 2026 || Learn SQL with Shanmukha

YouTube Excerpt: 🔥 Top 10 SQL & PL/SQL Interview Questions Explained | Real-Time Scenarios & Answers Are you preparing for SQL or PL/SQL interviews? In this video, we cover 10 of the most commonly asked and tricky interview questions that test your real-world database knowledge—not just theory! 🚀 What you’ll learn in this video: ✔ How to create a PRIMARY KEY even when duplicate data exists ✔ Using CHECK constraints without affecting existing invalid records ✔ Deferrable constraints and validating only at COMMIT time ✔ Powerful window functions like NTILE, LEAD, and LAG (with examples) ✔ Difference between UNIQUE, NOT NULL, and PRIMARY KEY constraints ✔ Debugging common PL/SQL mistakes in dynamic SQL ✔ Real-time use of PRAGMA AUTONOMOUS_TRANSACTION ✔ How NULL behaves in UNIQUE constraints (important interview trap!) ✔ SQL query to fetch only weekdays from the current month ✔ How to perform parallel inserts for large datasets ✔ Advanced trick to fetch 1st, 2nd, 3rd… nth NOT NULL values across columns 💡 This video is perfect for: * Freshers preparing for SQL interviews * Experienced developers brushing up on PL/SQL concepts * Anyone looking to understand real-time database scenarios 🎯 Bonus: We don’t just give answers—we explain the logic, edge cases, and real-world use cases that interviewers expect! ⏱ Timestamps: 00:00 Introduction 01:10 Handling duplicate data with constraints 05:30 Deferrable constraints explained 09:15 Window functions deep dive 14:40 Constraint concepts (PK vs Unique) 18:20 Debugging PL/SQL procedure 22:10 Autonomous transactions 26:00 NULL behavior in SQL 29:30 Weekday query solution 32:10 Parallel DML operations 35:00 Advanced NULL handling (Nth value logic) 👍 If you find this helpful, don’t forget to Like, Share & Subscribe for more SQL and PL/SQL content! 💬 Comment below: Which question was the toughest for you? #SQL #PLSQL #DatabaseInterview #OracleSQL #TechInterview #LearnSQL #Programming

🔥 Top 10 SQL & PL/SQL Interview Questions Explained | Real-Time Scenarios & Answers Are you preparing for SQL or PL/SQL interviews? In this video,...

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