Power BI Interview Questions- What type of schema preferred for Power BI modeling| Why Star Schema
In Power BI, Interview you may be asked, What type of schema is preferred for Power BI modeling? Why Star Schema is preferred by Power BI? Power BI Questions tutorial for freshers and experienced candidates. Get ready to crack the Power BI Job Interview.
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00:00 What type of schema is preferred for Power BI modeling?
00:20 Star Schema
01:30 Example of Star Schema
🔵Question 39: What type of schema is preferred for Power BI modeling?
Power BI generally prefers Star Schemas. The Star Schema involves a central fact table that contains measures and is connected to dimension tables. Dimension tables hold descriptive attributes and are directly related to the fact table. The fact table contains measures of interest, such as sales, profit, and revenue. The dimension tables contain attributes that describe the measures, such as product, customer, and time. This schema design simplifies queries, improves performance, and enhances the user experience by enabling efficient data analysis and exploration.
In a Star schema, it’s important to adhere to the rule that facts should not be directly joined with each other. In addition, no two dimension tables should be directly joined with each other. This design principle helps maintain the simplicity and effectiveness of the schema. It ensures that relationships are established between the central fact table and individual dimension tables, leading to improved query performance and data analysis capabilities.
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