Basics of M Power Query Formula Language.M is the powerful language behind the scene of Power Query.Any transformation you apply will be written in M language.For many, M looks like a scary language.In this post I like to explain a bit of basics of M.Not mentioning any functions.Mainly I want to explain to you how the M language syntax is structured.What is Mobirise Mobirise is a free offline app for Window and Mac to easily create smallmedium websites, landing pages, online resumes and portfolios, promo sites.Once you know the syntax, then everything becomes simple.M is a language that you can learn its syntax easily.As a Power Query developer I highly recommend you to spend time on M, because there are MANY operations that you can with M, but you might not be able to do it simply with the graphical interface.If you would like to learn more about Power BI, read Power BI book from Rookie to Rock Star.What is M M is informal name of Power Query Formula Language.The formal name is so long that no one uses that, everyone call it M M stands for Data Mashup, some say stands for Data Modeling.M is a functional language, and it is important to know functions of it.However, each language has a structure and syntax which is the beginner level of learning that language.In this post, I will explain the syntax of M.Before learning M, I would like you to read this sentence loud M is much more powerful than the graphical interface of Power Query.Yes, you read it correct The graphical interface of Power Query is changing every month.Every month new functionality comes to this graphical interface.But the fact is all of these functionalities has been in the language for many years There are heaps of examples for it.Grouping ability in Power Query with a very minor change in M script of it.Syntax of MSyntax of this language is simple.LET expression block, and IN expression block.Here is the most simple M syntax.M Power Query Formula Language is Case Sensitive.There is a difference between x and X.Yes, in actually means out So basically, the query below means defining a variable named as x, assigning the value 1 to it, and showing it as the result set.Open Power BI Desktop.Go to Get Data, start with New Blank Query.View tab, select advanced Editor Make sure when you write the script that you put reserved words such as let and in all lowercase.SelectTasksInSPD.png' alt='Sharepoint External List Custom Edit Formula' title='Sharepoint External List Custom Edit Formula' />As you can see, there is no need to define data types for variable.If you specify a text value, then variable would be a text data type automatically.End of the Line.Lines of codes in M continues if you dont put the end of the line character.As you can see in above example, the line continues, and x will be equal to x11.If you want to put an end for a line use comma,.Variable Names.Name of variables can be all one word, like Source.This is a variable name1This is a variable nameVariable name can contain special characters, here is an example Special characters.Variable names can have special character, as you can see below variable has all types of characters in it and still runs good.Escape character.Double quote is escape character.Step by Step Coding.Power Query is a step by step transformation.Every transformation usually happens in a step.While you are writing the code, you can also notice that in the right hand side, you will see every variable forms a step.The last variable is always specified in the in section.Literals.There are different ways of defining every literal in Power Query.For example, if you want to define a date variable, here is how to do it for defining all other types of literals, here is the reference table to use for function and type Ill write another post later to explain how these types works.Function Call.M is a functional language, and for doing almost everything you need to call a function for it.Edraw Network Diagram 6 Crack here.Date. Year function which fetch year part of a date.Functions names starts always with capital letters Date.YearCommentslike any programming language, you can put some comments in your code.Single line commentary with double slash Multi line commentary between slash and starts comments A real world example.Now that you know some basics, lets look at an existing query in advanced editor mode and understand it.There are still many parts of this query that you might not understand.I have written a blog post, that explains how to use shared keyword to get documentation of all functions in Power Query.In next posts, Ill explain another levels of structures in M.Reza Rad is an Author, Trainer, Speaker and DWBI Consultant.He has a BSc in Computer engineering he has more than 1.Microsoft technologies.He is a Microsoft MVP in Data Platform for seven continues years from 2.Microsoft BI. Download Hacking The Windows Registry Pdf File .
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