Amazon SQL Interview Questions

Preparing for a job interview can be a nerve-wracking experience, especially when it comes to technical roles. If you have an upcoming interview at Amazon for a SQL-related position, it’s essential to be well-prepared. SQL (Structured Query Language) is a powerful tool used for managing and manipulating relational databases, and having a good understanding of it is crucial for success in many roles at Amazon.

In this article, we will provide you with a comprehensive list of Amazon SQL interview questions that can help you prepare for your upcoming interview. By familiarizing yourself with these questions and their answers, you can gain the confidence and knowledge to ace your interview and land your dream job at Amazon!

Before we dive into the questions, it’s important to note that Amazon is known for its rigorous interview process. While the questions provided here can give you an idea of what to expect, it’s highly recommended to thoroughly study SQL concepts and practice solving problems using SQL beforehand.

See these Amazon SQL interview questions

• What is SQL and its main components?
• What is the difference between UNION and UNION ALL?
• Explain the different types of JOINs in SQL.
• What is the purpose of the GROUP BY clause?
• What is the difference between WHERE and HAVING clauses?
• Explain the difference between a primary key and a foreign key.
• What is normalization in SQL?
• Explain the concept of indexing in databases.
• What is the purpose of the ORDER BY clause?
• What are triggers in SQL?
• How do you find the second highest salary from an Employee table?
• What is the difference between a clustered and non-clustered index?
• Explain the ACID properties in the context of databases.
• How do you calculate the total number of records in a table?
• What is the purpose of the COMMIT and ROLLBACK statements?
• What is the difference between a view and a table?
• Explain the concept of deadlock and how it can be avoided.
• How do you find duplicate records in a table?
• What is the purpose of the LIMIT clause in SQL?
• What is the role of the WHERE clause in a SQL query?
• Explain the difference between a stored procedure and a function.
• How do you handle NULL values in SQL?
• What is the purpose of the CAST and CONVERT functions?
• How do you calculate the average of a column in a table?
• What is the difference between a natural join and an inner join?
• Explain the concept of data integrity in SQL.
• How do you update multiple rows in a table simultaneously?
• What is the purpose of the LIKE operator in SQL?
• What is the difference between a unique key and a primary key?
• Explain the concept of self-join in SQL.
• How do you retrieve the current date and time in SQL?
• What is the purpose of the CASE statement in SQL?
• How do you calculate the sum of a column in a table?
• What is the difference between a left join and a right join?
• Explain the concept of database normalization forms.
• How do you delete duplicate records from a table?
• What is the purpose of the TRUNCATE statement in SQL?
• What is the difference between a subquery and a nested query?
• Explain the concept of referential integrity in SQL.
• How do you add a new column to an existing table in SQL?
• What is the purpose of the EXISTS operator in SQL?
• What is the difference between a primary key and a unique key?
• Explain the concept of data types in SQL.
• How do you sort records in descending order using SQL?

These are just a few examples of the many possible SQL interview questions you might encounter during the Amazon interview process. Remember to thoroughly study SQL concepts, practice solving problems, and be confident in your abilities. Good luck with your Amazon interview!