---
title: "Junk Dimension Explained (Clean Up Your Fact Table) | #Power BI Course 21"
url: https://daily.dev/posts/junk-dimension-explained-clean-up-your-fact-table-power-bi-course-21-i4lqjpubo
source_url: https://www.youtube.com/watch?v=jUa2edBhGPA
type: video:youtube
source: "Data with Baraa"
published: 2026-06-10T13:27:27.180Z
updated: 2026-06-10T13:27:43.610Z
tags: ["data-warehouse", "power-bi"]
reading_time: 12
upvotes: 0
comments: 0
language: en
---

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# Junk Dimension Explained (Clean Up Your Fact Table) | #Power BI Course 21

**[Data with Baraa](https://daily.dev/sources/datawithbaraa)** · 12 min read · 0 upvotes · 0 comments

## Summary

A tutorial on identifying and extracting descriptive columns from fact tables in Power BI using dimensional modeling best practices. Covers how to create a proper payment dimension from related columns (payment method, card network, card type) and how to handle unrelated flag columns using a junk dimension. Step-by-step walkthrough in Power Query includes duplicating the fact table, removing duplicates, adding an index as a surrogate key, merging back to get the ID, and cleaning up the fact table to achieve a clean star schema.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.youtube.com/watch?v=jUa2edBhGPA>

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---

Tags: [#data-warehouse](https://daily.dev/tags/data-warehouse), [#power-bi](https://daily.dev/tags/power-bi)

[View this post on daily.dev](https://daily.dev/posts/junk-dimension-explained-clean-up-your-fact-table-power-bi-course-21-i4lqjpubo)