Question: Assume you are given the below table on watch times (in minutes) for all users, where each user is based in a given city. Write a query to return all pairs of cities with total watch times within 10000 minutes of one another. Difficulty Level: Easy, Source: Nicksingh, Tag: Disney SQL Interview Question Assumptions: No NULLS present; DBMS: … Read more
Question: Assume you are given the below tables on users and user posts. Write a query to get the distribution of the number of posts per user for each given day. Explanation & Definition: Each user will have a certain post count for each day, by daily distribution we mean for each day we need the … Read more
Question: Assume you are given a table for spending activity by product type. Write a query to calculate the cumulative spend for each product over time (days) in chronological order. Difficulty Level: Medium, Source: NickSingh.com, Tag: UBER SQL Interview Question Note: Cumulative sum is the same as running totals, which is used to display the data as it grows … Read more
Question: Assume you have the below ‘events’ table on app analytics. Write a query to get the click-through rate (CTR) per app in 2019. Difficulty Level: Easy, Source: NickSingh.com, Tag: Facebook SQL Interview Question Note: CTR is the number of clicks that your ad receives divided by the number of times your ad is shown. i.e CTR = total_clicks/total_ads_served … Read more