The #COALESCE function in DAX (Data Analysis Expressions) is used to return the first non-blank value in a list of expressions. It takes multiple expressions as arguments and evaluates them in order from left to right, returning the first expression that is not blank or empty.
The syntax of the COALESCE function is as follows:
COALESCE(expression1, expression2, ...)
Suppose you have a table called "Sales" with columns "Region", "Sales1", and "Sales2". You want to create a new column called "Total Sales" that adds up the sales from both columns, but you want to use the non-blank value from either "Sales1" or "Sales2" if one of them is blank.
Here's how you can do it using the COALESCE function:
Total Sales = COALESCE(Sales[Sales1], Sales[Sales2])
In this example, the COALESCE function will evaluate the expression Sales[Sales1] first, and if it is not blank, it will return that value. Otherwise, it will evaluate the expression Sales[Sales2] and return that value if it is not blank. If both expressions are blank, the COALESCE function will return a blank value.
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