Syntax
Enables the user to create another column, in the Summarize function, that returns True if the row contains sub-total values for the column given as argument to ISSUBTOTAL, otherwise returns False.
SUMMARIZE(<table>, <groupBy_columnName>[, <groupBy_columnName>]…[, ROLLUP(<groupBy_columnName>[,< groupBy_columnName>…])][, <name>, {<expression>|ISSUBTOTAL(<columnName>)}]…)
Tutorial with example
In todays video I will show you how to use the DAX function ISSUBTOTAL.

Download example files:
Download the pbix here.
Remarks
- ISSUBTOTAL can only be used in the expression part of a SUMMARIZE function.
- ISSUBTOTAL must be preceded by a matching name column.
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