Calculate Total Revenue in USD Using SQL Query

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PracHub provides an interactive SQL console where you can write and test queries against real database schemas. Get instant feedback and compare your solution with the expected output.

Q: What difficulty level is this coding question?

This is a medium difficulty Data Manipulation (SQL/Python) question, commonly asked during Onsite rounds at Meta.

Q: What role is this question designed for?

This question is commonly asked for Data Scientist candidates at Meta during technical interviews.

Question

ads_revenue

+---------+------------+---------+----------+
| ad_id   | country    | revenue | currency |
+---------+------------+---------+----------+
| 101     | US         | 120.00  | USD      |
| 102     | DE         | 90.00   | EUR      |
| 103     | JP         | 13000   | JPY      |
| 104     | IN         | 7000    | INR      |
| 105     | FR         | 85.00   | EUR      |
+---------+------------+---------+----------+

exchange_rate

+----------+----------+
| currency | usd_rate |
+----------+----------+
| USD      | 1.00     |
| EUR      | 1.08     |
| JPY      | 0.0065   |
| INR      | 0.012    |
+----------+----------+

##### Scenario

An ad-tech team stores revenue generated from ad impressions in various currencies and needs total revenue in USD for daily reporting.

##### Question

Write a SQL query that returns the total advertising revenue converted to USD, using the revenue and currency columns in ads_revenue and today’s rates in exchange_rate.

##### Hints

Join ads_revenue with exchange_rate, multiply revenue by usd_rate, then SUM.

PracHub · Accepted Answer

This question evaluates proficiency in SQL data manipulation, focusing on joins, aggregations, and handling currency conversion across relational tables.

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