This article is about the SQL Interview Questions asked by Walmart for their Data Analyst post. It offers detailed solutions and explanations to help you prepare data analysts effectively. These SQL Interview Questions, shared by an experienced Data Analyst, cover a range of SQL concepts crucial for success in the interview process.
There are a total of 3 SQL queries with their solution that were asked in the interviews for the Data Analyst Post at Walmart. Walmart is an American multinational retail corporation that operates a chain of hypermarkets, discount department stores, and grocery stores in the United States and 23 other countries.
Note: To help you better understand the SQL solutions presented in this article, we’ve used db-fiddle. This free online tool allows you to execute SQL queries directly against a database and see the results instantly. For each question, you’ll find a link to a corresponding db-fiddle, where you can explore the data, modify the queries, and experiment to solidify your understanding.
select *
FROM(
SELECT
e.employee_id,
e.employee_name,
d.department_id,
d.department_name,
e.salary,
RANK() OVER(PARTITION BY d.department_id ORDER BY e.salary DESC) AS salary_rank
FROM Employees e
LEFT JOIN Departments d ON e.department_id = d.department_id) sal
where salary_rank = 2;
Db-fiddle Link: https://www.db-fiddle.com/f/nDanCgDc8dhQJWzmX3Cv8s/0
SELECT
user_id,
user_name,
COUNT(*) AS transaction_count
FROM Transactions INNER JOIN Users USING(user_id)
GROUP BY user_id;
Db-fiddle Link: https://www.db-fiddle.com/f/99faQQr3dez6VWJTvXJtZn/0
SELECT
project_id,
project_name,
budget,
no_of_emp,
round((budget / no_of_emp),2) AS ratio
FROM
(
SELECT
p.project_id,
p.project_name,
p.budget,
COUNT(e.employee_id) as no_of_emp
FROM Projects p LEFT JOIN Employees e on p.project_id = e.project_id
GROUP BY p.project_id, p.project_name) data
ORDER BY ratio DESC
LIMIT 1;
Db-fiddle Link: https://www.db-fiddle.com/f/an2pDriLARsihEqbMCfSK1/0
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Hi, I’m Anuja Bisht, a recent graduate from DU SOL with a passion for digital marketing. I created Curious Club (curiousclub.in) to help you stay ahead of the job curve. My goal is to provide you with the latest job updates and resources, empowering you to land your dream career.
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