SWITCH DAX Function

The SWITCH function evaluates an expression against a list of values and returns one of multiple possible result expressions.

DAX Syntax SWITCH(Expression, Value1, Result1[, Value2, Result2]…[,Else])

The function has the following parameters:
• Expression: Any DAX expression that returns a single scalar value, where the expression is to be evaluated multiple times (for each row/context).
• Value: A constant value to be matched with the results of expression.
• Result: Any scalar expression to be evaluated if the results of expression match the corresponding value.
• Else: Any scalar expression to be evaluated if the result of expression doesn't match any of the value arguments.

Example: The following example creates a calculated column of month names.

DAX

Month name = SWITCH(MONTH(Sheet1[Dates]), 1, "January", 2, "February", 3, "March", 4, "April" , 5, "May", 6, "June", 7, "July", 8, "August" , 9, "September", 10, "October", 11, "November", 12, "December" , "Unknown month number")
SWITCH dax function