Mahesh Pensalwar

Analyst

Handles the questions an analyst is asked day to day.

Practicing since October 20261-day streak

Points

1,440

Questions solved

61

Projects finished

0

Longest streak

2 days

Badges

• First question
• 10 questions
• 25 questions
• 50 questions

Skills

Skill map

Every topic in the question bank, and how much of each one Mahesh has worked through.

• Query foundations

  Learning · 32 of 69

  Reading a table and asking it a straight question.

  • Dates9/16
  • Conditional logic8/12
  • Strings0/11
  • Calculations3/10
  • NULL handling5/9
  • Filtering3/7
  • Logical operators4/4

• Combining data

  Learning · 14 of 36

  Putting tables together without losing or duplicating rows.

  • Joins7/15
  • Reshaping2/15
  • Subqueries4/5
  • Deduplication1/1

• Aggregation and windows

  Learning · 13 of 71

  Summarizing, ranking and comparing rows against their group.

  • Window functions4/32
  • Ranking2/15
  • Aggregations7/14
  • Running totals0/10

• Python foundations

  Learning · 2 of 21

  The data structures every Python interview leans on.

  • Arrays1/6
  • Lists0/5
  • Tuples0/3
  • Dictionaries0/3
  • Math1/3
  • Sorting0/1

• Algorithms

  Not started · 0 of 17

  The patterns behind the timed screening rounds.

  • Hashing0/8
  • Two pointers0/4
  • Binary search0/4
  • Sliding window0/1

Certificates

• Analyst

  Earned Oct 11, 2026

  Open certificate

• Junior Analyst

  Earned Oct 9, 2026

  Open certificate

Projects

No Data Labs projects posted yet.