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SQL Interview Questions

Review this list of 72 SQL interview questions and answers verified by hiring managers and candidates.

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Monthly Sales Report
2 years ago5 answers
Find Revenue by Department
2 years ago7 answers
Unique Chat Conversations
3 years ago6 answers
Number of Direct Reports
3 years ago8 answers
Video Game Matchmaking
3 years ago7 answers
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Validate Bitcoin Transactions
3 years ago5 answers
EPA Temperature Monitoring
3 years ago6 answers
Nth Ranked Player
3 years ago5 answers
Find Customers by Department
2 years ago4 answers
Given users, books, and checkout data, find the number of users who checked out books in the geography category grouped by age.
5 months ago
What’s the most complex SQL query you’ve written? Walk me through what it did, the key concepts involved, and the types of joins you used.
9 months ago
Given a library-style schema with books, users, and check-in/check-out data, write a query to find for each user the number of books they checked out and did not return before the due date, and return the username and count.
5 months ago

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