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Costco SQL & Python Interview Questions

Practice 14 SQL and Python interview questions modeled after the kind of data and analytics work done at Costco. 7 SQL and 7 Python problems covering retail & e-commerce data challenges — from data transformation and aggregation to advanced analytical queries. Graded instantly in your browser.

Costco

Retail & E-Commerce

SQL

Python

Difficulty Breakdown

14 problems

0 Easy(0%)

7 Medium(50%)

5 Hard(36%)

2 Expert(14%)

Skills You'll Practice

13 topics

SQL · 7

aggregationbasic queries filteringcleaning transformjoinsscenario sqlsubqueries cteswindow functions

Python · 6

feature engineeringpandas aggregationpandas applypandas mergingpandas scenariopandas window

All Problems14 total

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