Power BI Power query DAX M

Power BI M functions

Posted by John Liu on Tuesday, August 6, 2024

Empty table

This query returns a table with a single text column called YourColumnName and no rows.

let
  Source = #table(
    type table [YourColumnName = text],
    {}
  )
in
  Source

Conditional Formatting

Highlight max and min

This function returns the color value for the Total Sales figure based on if the value is the max/min or other.

MaxMin =
VAR Sales = [Total Sales]
VAR MaxSalesOverall =
MAXX(
	ALLSELECTED('dimDate'[Year],'dimDate'[Quarter],'dimDate'[QuarterNo]),
	CALCULATE([Total Sales])
)
VAR MinSalesOverall = 
MINX(
	ALLSELECTED('dimDate'[Year],'dimDate'[Quarter],'dimDate'[QuarterNo]),
	CALCULATE([Total Sales])
)
VAR Result =
SWITCH(
	TRUE,
	Sales = MaxSalesOverall, "#22957e",
	Sales = MinSalesOverall, "#ff908c",
	"#7bc8fe"
)
RETURN
Result

Above Average

This function indicates if the Total Sales value is above average (1) or not (0).

AboveAvg =
VAR Sales = [Total Sales]
VAR AvgSalesOverall =
AVERAGEX(
	ALLEXCEPT(dimDate,'dimDate'[Date],'dimDate'[Day],'dimDate'[DayNo],'dimDate'[Month],'dimDate'[MonthNo]),
	CALCULATE([Total Sales])
)
VAR Result =
IF(
	Sales>AvgSalesOverall,
	1,
	0
)
RETURN
Result
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