Filter/Distinct Count Help - Remove all records with same ID when one is filtered out.

Hi, min-E 

Create a new table to get an item1 that has nothing to do with the table to use as a slicer:

Table 2 = SELECTCOLUMNS('Table','Table'[Item1])

Create a new measure to exclude the id value of the item selected by the slicer:

Measure = 
 VAR _ID = CALCULATE(MAX('Table'[ID]),FILTER(ALLSELECTED('Table'),'Table'[Item1]=SELECTEDVALUE('Table 2'[Item1])))
 RETURN
 IF(SELECTEDVALUE('Table'[ID])<>_ID,1)

Put Item1 from Table 2 into the slicer, and then put the measure into the table visual, here is my preview:

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Best Regards

Yongkang Hua

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