SQL Interview Questions & Answers

150 questions with detailed answers

KyK INTERVIEW COLLECTION

SQLQuery. Diagnose. Explain.

150INTERVIEW QUESTIONS
& detailed answers

15 chapters3 worked exercises5 free samples

₹499

150 original interview questions and detailed answers across 15 chapters. Includes definition-first explanations, practical scenarios, diagrams, code where useful and linked technical documentation.

150 questions · 15 chapters
3 worked exercises
5 free samples

What’s included

Explain joins, grouping and window functions with concrete results
Write analytical queries with explicit grain and tie handling
Diagnose plans, indexes, cardinality and transaction problems
Build safe incremental loads and reconciliation checks

View all 15 chapters

Query fundamentals10 questions
Joins and cardinality10 questions
Grouping and aggregation10 questions
Window functions10 questions
Subqueries and CTEs10 questions
Dates strings and nulls10 questions
Schema design and constraints10 questions
Transactions and isolation10 questions
Indexes and access paths10 questions
Query performance diagnosis10 questions
Analytical SQL patterns10 questions
Data quality and reconciliation10 questions
Incremental data processing10 questions
SQL coding case studies10 questions
SQL engineering and delivery10 questions