Amazon and Google don't just ask SQL questions in interviews.
They use SQL to filter out candidates before the real conversation even starts.
Here are the question types both companies test, with the queries 👇
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5 SQL interview questions that eliminate most candidates:
1. What is indexing?
2. Difference between clustered & nonclustered index?
3. What causes deadlocks?
4. Full vs Differential backup?
5. How does SQL failover work?
Simple concepts. Huge impact. 🚀
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150 SQL Queries for Practice Before Interview😍
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This SQL query looks correct—but it may return ZERO rows 😵
SELECT *
FROM employees
WHERE department_id NOT IN (
SELECT department_id
FROM departments
);
When can this happen?
Hint: One small value can break the logic.
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Preparing for an SQL interview? 🧐 This Cheat Sheet covers all the essentials, from SELECT & JOINs to aggregation, subqueries, and key functions.
Perfect for a quick review before the big day!
Check it out 👉
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Quick SQL interview question:
What is the difference between WHERE and HAVING?
A) They are identical
B) WHERE filters rows; HAVING filters groups
C) HAVING is always faster
D) WHERE works only with joins
Bonus: Can HAVING be used without GROUP BY?
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