Making your M Queries Dynamic in Power BI Nick Lee Making your M Queries Dynamic in Power BI

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About Nick Trainer and Consultant Technical Editor of Books My parents always told me that my life won’t go anywhere if I’m on the computer all day and night. Trainer and Consultant Technical Editor of Books Presenter in JSSUG Blogs at backtoSQL.wordpress.com Twitter: @backtoSQL nlee@pragmaticworks.com

Data Discovery with Power BI Desktop

Development Lifecycle Data Discovery Data Modeling Data Visualization

M Basics with M Data cleansing with M

M Basics What is M? Why M? Understanding M syntax

Using M Query Formulas What is M Query? ‘M’ is for Mashup M is easily made dynamic Why M Query? Data Transformations Pivot/Unpivot Removing unwanted characters Splitting columns Query editor is just a UI that generates M

M Query Fundamentals Where to Write M M Query Results M Query Tips Query Editor formula bar View > Advanced Editor M Query Results Can produce a single value, list (array), table, function Can be copied and pasted to other workbooks but not the best sharing method M Query Tips Case sensitive! Use #shared to return Library Functions

#shared

Previous step reference Named Expressions / Variables Taking a look at M code M Functions Let Expression Previous step reference Named Expressions / Variables In Expression / Output

Dynamic Source Query Variables and Parameters

Working with Variables & Parameters What is a variable? A variable is a place holder. Changeable, Not-Constant

Parameters Make queries and connections dynamic Create / Edit Parameters Currently no “Global” Parameters.