Varchasv Hoon

@VarchasvH

Data Engineer | PySpark | SQL | Databricks

IndiaJoined February 2022

About

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:

Solving 2 Leetcode problems daily (SQL + DSA).
Blogging about each problem.
Building in public.

My Goal - Land a better data engineering role by mid-2026.

Follow my journey !!

Varchasv Hoon's blogs

Varchasv Hoonvarchasvh.hashnode.dev84 posts

Recently published

varchasvh.hashnode.dev

LeetCode 262: Trips and Users

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...

5d ago2 min read

varchasvh.hashnode.dev

LeetCode 601: Human Traffic of Stadium

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...

6d ago2 min read

varchasvh.hashnode.dev

LeetCode 1070: Product Sales Analysis III

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...

Feb 132 min read

varchasvh.hashnode.dev

LeetCode 1045: Customers Who Bought All Products

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...

Feb 121 min read

varchasvh.hashnode.dev

LeetCode 1141: User Activity for the Past 30 Days I

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...

Feb 122 min read

Search Hashnode

Varchasv Hoon

About

Varchasv Hoon's blogs

Recently published

LeetCode 262: Trips and Users

LeetCode 601: Human Traffic of Stadium

LeetCode 1070: Product Sales Analysis III

LeetCode 1045: Customers Who Bought All Products

LeetCode 1141: User Activity for the Past 30 Days I