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Retail Sample Dataset
A realistic multi-table retail dataset with deliberate data quality problems, for practice and portfolio work.
120 downloads
Why it has problems in it#
Clean datasets teach you syntax. This one has duplicate customers, inconsistent date formats, a currency column with mixed units and a supplier table with orphaned keys — because handling those is the actual job.
Five tables, roughly 2 million rows, generated with a fixed seed so results are comparable.
#Portfolio projects#Beginner friendly
Coming shortly
This resource is written but the file is not attached yet.
Where this is used
Data Systems
Laptop Data Platform
Ingestion, transformation, orchestration, testing and a BI layer — the full modern data stack, running locally on DuckDB, dbt and Dagster.
BeginnerDifficulty: Beginner~8h buildDuckDB · dbt · Dagster
Code
Career Lab
The Analytics Portfolio That Actually Gets Interviews
Three real projects beat thirty notebooks. What hiring managers screen for, and the structure that survives a five-minute skim.
BeginnerDifficulty: Beginner2 min readSQL · Python · Power BI