I'm Varchasv, a Data Engineer working on enterprise data integration.
Currently on a 90-problem challenge to level up my technical skills and switch to a more development-focused role.
What I'm doing:
My Goal - Land a better data engineering role by mid-2026.
Follow my journey !!
Nothing here yet.
Feb 17 · 2 min read · Date: February 17, 2026Category: SQLTime Taken: 30 minutesDifficulty: Hard Problem Statement The cancellation rate is computed by dividing the number of canceled (by client or driver) requests with unbanned users by the total number of requests with...
Join discussionFeb 16 · 2 min read · Date: February 16, 2026Category: SQLTime Taken: 15 minutesDifficulty: Hard Problem Statement Write a solution to display the records with three or more rows with consecutive id's, and the number of people is greater than or equal to 100 for each. Re...
Join discussionFeb 13 · 2 min read · Date: February 13, 2026Category: SQLTime Taken: 15 minutesDifficulty: Medium Problem Statement Write a solution to find all sales that occurred in the first year each product was sold. For each product_id, identify the earliest year it appears in t...
Join discussionFeb 12 · 1 min read · Date: February 12, 2026Category: SQLTime Taken: 10 minutesDifficulty: Medium Problem Statement Write a solution to report the customer ids from the Customer table that bought all the products in the Product table. Link: Customers Who Bought All Prod...
Join discussionFeb 12 · 2 min read · Date: February 12, 2026Category: SQLTime Taken: 10 minutesDifficulty: Easy Problem Statement Write a solution to find the daily active user count for a period of 30 days ending 2019-07-27 inclusively. A user was active on someday if they made at lea...
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