powerquery

Is there a way to comment M code / comment out lines or blocks of code? Alejandro Lopez-Lago - MSFT M supports two different types of comments: Single line comments can be started with // You can comment out multiple lines or comment out text in the middle of a line using /* */ (e.g. = 1 + /* some comment */ 2 ) Comments might seem to disappear in the formula bar if they are at the end of the line, but they are still there. You can verify this by looking at your code in the Advanced Editor. 来源： https://stackoverflow.com/questions/31569679/how-do-i-comment-in-power-query-m

Say I am importing something like the following into PowerBI: Date | Quantity |---------------------|------------------| | 1/1/2018 | 22 | | 1/3/2018 | 30 | | 1/4/2018 | 10 | |---------------------|------------------| Where the external source table is a series of date, value rows with some date values missing. I'd like to execute some DAX/M to add any missing date rows into the data set, where 'Quantity' value is taken from the first date prior. So my resulting dataset would like like this: Date | Quantity |---------------------|------------------| | 1/1/2018 | 22 | | 1/2/2018 | 22 | | 1/3

I have been working on Power BI for a while now and I often get confused when I browse through help topics of it. They often refer to the functions and formulas being used as DAX functions or Power Query, but I am unable to tell the difference between these two. Please guide me. M and DAX are two completely different languages. M is used in Power Query (a.k.a. Get & Transform in Excel 2016) and the query tool for Power BI Desktop. Its functions and syntax are very different from Excel worksheet functions. M is a mashup query language used to query a multitude of data sources. It contains

I have a requirement where I have a table like this - Actual Table with 2 columns Column1 Column2 ColAValue $$ ColBValue $$ New Row ColCValue Above Row ColCValue2 Above Row $$ ColDValue Above Row ColAValue $$ ColBValue $$ ColCValue $$ ColDValue New Row ColAValue $$ ColBValue $$ ColCValue New Row $$ ColDValue Above Row I know by requirement, I would have 4 columns in my dataset leaving column 2 . I need my transformed table as a new table using query editor. This is my expected output, OutTable with 4 columns Basically the column values are identified in order by delimiter $$ and if column2

Looking for a followup to Max Zelensky's solution here . Assuming the original example had a [Date] field, I'm trying to go one more level and add a column that shows the prior [Date] value I've also looked here and here and here . Per Max, I've created the table of tables: AddedCustom = Table.AddColumn(GroupedRows, "Custom", each Table.AddIndexColumn([tmp],"Occurrence", 1,1) type table) Created a second index: SecondIndex= Table.AddColumn(AddedCustom, "Custom.2", each Table.AddIndexColumn([Custom],"Occurance.2", 0,1), type table) I've successfully added a column that references the current