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You're reading from  Expert Data Modeling with Power BI - Second Edition

Product typeBook
Published inApr 2023
PublisherPackt
ISBN-139781803246246
Edition2nd Edition
Concepts
Business Intelligence
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Author (1)
Soheil Bakhshi
Soheil Bakhshi
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Soheil Bakhshi

Soheil Bakhshi is the founder of Data Vizioner and is a sought after BI consultant. Working in data and analytics for more than 20 years, Soheil's experience lies in Microsoft BI, Data Warehousing, and Power BI platform. He possesses MSCE, MCSA certifications and is a Microsoft MVP (Most Valuable Professional). He has a passion for sharing knowledge via his website and speaking at conferences and Power BI community events locally and globally. In following his desire for simplicity and efficiency, he is behind Power BI community tools and commercial products such as Power BI Exporter and Power BI Documenter.
Read more about Soheil Bakhshi

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Appreciate case sensitivity in Power Query

As explained before, Power Query is case-sensitive. Case sensitivity is not just about the Power Query syntax; string data types in opposite cases are not equal in Power Query. So it is essential to pay attention to character cases when working with string data. When we mash up data from different sources, we often have GUIDs as key columns (either a primary or a foreign key). We get incorrect results if we compare the GUID values with different cases. For instance, in Power Query, the following values are not equal:

  • C54FF8C6-4E51-E711-80D4-00155D38270C
  • c54ff8c6-4e51-e711-80d4-00155d38270c

Therefore, if we merge two tables joining the key columns, we get weird results. It is also the case if we load the data into the data model and create a relationship between two tables with key columns in different character cases. The solution is simple; we only need to keep both key columns in the same character case using either...

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Expert Data Modeling with Power BI - Second Edition
Published in: Apr 2023Publisher: PacktISBN-13: 9781803246246
© 2023 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Soheil Bakhshi

Soheil Bakhshi is the founder of Data Vizioner and is a sought after BI consultant. Working in data and analytics for more than 20 years, Soheil's experience lies in Microsoft BI, Data Warehousing, and Power BI platform. He possesses MSCE, MCSA certifications and is a Microsoft MVP (Most Valuable Professional). He has a passion for sharing knowledge via his website and speaking at conferences and Power BI community events locally and globally. In following his desire for simplicity and efficiency, he is behind Power BI community tools and commercial products such as Power BI Exporter and Power BI Documenter.
Read more about Soheil Bakhshi

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