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The Definitive Guide to Power Query (M)

You're reading from   The Definitive Guide to Power Query (M) Mastering complex data transformation with Power Query

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Product type Paperback
Published in Mar 2024
Publisher Packt
ISBN-13 9781835089729
Length 758 pages
Edition 1st Edition
Languages
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Authors (3):
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Greg Deckler Greg Deckler
Author Profile Icon Greg Deckler
Greg Deckler
Melissa de Korte Melissa de Korte
Author Profile Icon Melissa de Korte
Melissa de Korte
Rick de Groot Rick de Groot
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Rick de Groot
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Toc

Table of Contents (19) Chapters Close

Preface 1. Introducing M FREE CHAPTER 2. Working with Power Query/M 3. Accessing and Combining Data 4. Understanding Values and Expressions 5. Understanding Data Types 6. Structured Values 7. Conceptualizing M 8. Working with Nested Structures 9. Parameters and Custom Functions 10. Dealing with Dates, Times, and Durations 11. Comparers, Replacers, Combiners, and Splitters 12. Handling Errors and Debugging 13. Iteration and Recursion 14. Troublesome Data Patterns 15. Optimizing Performance 16. Enabling Extensions 17. Other Books You May Enjoy
18. Index

Dates and times

As one might anticipate, the representation of both a date and a time is possible within the M language. This data type is a datetime data type and exhibits similar properties to both date data types and time data types. In fact, since dates are simply whole numbers based upon a reference date and time is a decimal number reflecting the fractions of a day, a datetime data type can be represented as a decimal number, where the whole number portion represents the date and the decimal portion represents the time. For example, the following expression returns noon on February 14th (2/14/2024 12:00:00 PM):

DateTime.From(45336.5)

The individual components of date and time can be extracted from a datetime data type using the DateTime.Date and DateTime.Time functions. Alternatively, the DateTime.ToRecord function returns a record with field/value pairs for Year, Month, Day, Hour, Minute, and Second.

Similar to dates and times, a constructor is available for the...

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