The if expression selects between two expressions based on a logical condition.
Output a query formula step using the in statement. powerquery-m. let FirstGreaterThan5 = (list) => let GreaterThan5 = List.Select (list, (n) => n> 5), First = List.First (GreaterThan5) in First, Results = [ Found = FirstGreaterThan5 ( {3,7,9}), // equals 7 NotFound = FirstGreaterThan5 ( {1,3,4}) // equals null ] in Results. M code is the language behind the scenes of power query. 1) M is only the unofficial name.
To learn more about expressions and values, see Expressions, values, and let expression. Functions can be used recursively. Simple Power Query … M is a functional language which means it is primarily written with functions that are called to …
For example: powerquery-m. if 2 > 1 then 2 + 2 else 1 + 1. In practice and as per the examples, a combination of both tools is recommended to aid the query development process. A core capability of Power Query is to filter and combine, that is, to mash-up data from one or more of a rich collection of supported data sources. Power Query works with Analysis Services, Excel, and Power BI workbooks.
Please note that the Power Query Formula Language is case sensitive. Any such data mashup is expressed using the Power Query M Formula Language. When you create a data transformation in the power query editor UI, Excel is writing the corresponding M code for the query. Examples are provided of using the Query Editor interface and the M language directly to construct and refine queries to meet common data transformation and cleansing needs.
The first expression (2 + 2) is selected if the logical expression (2 > 1) is true, and the second expression (1 + 1) is selected if it is false. Each query formula step builds upon a previous step by referring to a step by its variable name. Generally, the last query step is used as the in final data set result.
It was the code name, when M was a standalone language (well before Power Query was thought of – it was developed for a completely different project), and the official name now is “Power Query Formula Language” but there are still lots of references to M around in the docs. It's a functional, case sensitive language similar to F#.
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