Comparing two columns in different tables and creating a new table with the difference.

[Fali324]

Hi 

I have the column Job No in two tables (June & July).

I want to compare both the tables and pull out the new job no which are in July's table but not in June.

How can I do this in Power BI?

Thank You

[foodd]

Using DAX.  Create a Calculated Table, and use the DAX EXCEPT Expression.

Expression Name:  EXCEPT

Description:  Returns the rows of the first table in the expression which do not appear in the second table.

Syntax:  EXCEPT(<table_expression1>, <table_expression2> 

Reference URL:  EXCEPT function (DAX) - DAX | Microsoft Learn

To produce a delta table where you would like to show what Job Codes appear only in July,

do the following:

Dax Expression would be:  Jobs only in July = EXCEPT(July,June)

[Vijay_A_Verma · Accepted solution]

Use Left Anti Join. 

In July table, insert this statement where Source must be replaced with your previous step name in July table

= Table.RemoveColumns(Table.NestedJoin(Source, {"Job No"}, June, {"Job No"}, "Temp", JoinKind.LeftAnti), {"Temp"})