PowerQuery M - Query language

PowerQuery M is a query language created in 2015.

#1563on PLDB

9Years Old

The Power Query M formula language is optimized for building highly flexible data mashup queries. It's a functional, case sensitive language similar to F#.

Tags: queryLanguage
Early development of PowerQuery M happened in Microsoft
Monaco package for syntax highlighting PowerQuery M
Read more about PowerQuery M on the web: 1.

Example from the web:

"Hello World"             // a text value
123                       // a number
1 + 2                     // sum of two numbers
{1, 2, 3}                 // a list of three numbers
[ x = 1, y = 2 + 3 ]      // a record containing two fields:
                          //        x and y
(x, y) => x + y           // a function that computes a sum
if 2 > 1 then 2 else 1    // a conditional expression
let x = 1 + 1  in x * 2   // a let expression
error "A"                 // error with message "A"

Example from the web:

let Orders = Table.FromRecords({
    [OrderID = 1, CustomerID = 1, Item = "fishing rod", Price = 100.0],
    [OrderID = 2, CustomerID = 1, Item = "1 lb. worms", Price = 5.0],
    [OrderID = 3, CustomerID = 2, Item = "fishing net", Price = 25.0]}),
    #"Capitalized Each Word" = Table.TransformColumns(Orders, {"Item", Text.Proper})
in
    #"Capitalized Each Word"

PowerQuery M Keywords

as each else error false if in is let meta otherwise section shared then true try type

Language features

Feature	Supported	Example	Token
Conditionals	✓
Booleans	✓		true false
MultiLine Comments	✓	/* A comment */	/* */
Strings	✓		"
Comments	✓	// A comment
Line Comments	✓	// A comment	//
Semantic Indentation	X