Thursday 21 December 2023

What is the master table in Power BI ? Power BI interview questions and answers 059

 What is the master table in Power BI ?

In the context of Power BI, the term "master table" can have different meanings depending on how it's used. Here are two possible interpretations:

1. Central reference table: This refers to a table that holds core information used across multiple other tables in your data model. It often contains unique identifiers and descriptive attributes that other tables reference to establish relationships and provide context. Think of it as the foundational layer of your data model, like a customer table used by sales, marketing, and support reports.

2. Specific model table: Sometimes, users refer to a particular table within their data model as the "master table" simply because it serves as the main point of entry or the most frequently used table for analysis. This doesn't imply any inherent superiority or centrality, but rather signifies its importance within the specific context of the user's needs.

Here are some key points to remember:

  • There's no single, predefined "master table" in Power BI. Its meaning depends on the specific data model and individual usage.

  • Having a central reference table with unique identifiers and descriptive attributes is generally considered good practice for data modeling in Power BI.

  • Labeling a specific table as "master" might be helpful for communication within a team working on the same data model.

Ultimately, the term "master table" is used flexibly in Power BI. Understanding the context and the specific data model is crucial to interpreting its meaning correctly.

I hope this clarifies the potential interpretations of "master table" in Power BI. If you have any further questions about your specific data model or table layout, feel free to ask!

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