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I. QUESTION
I am looking for a DAX formula that return me the number of ID which appear in 2,3,4......consecutive months
ID Month
A1 1/1/2018
A2 1/3/2018
A3 1/15/2018
A4 2/1/2018
A1 2/4/2018
A5 2/14/2018
A3 2/15/2018
A1 3/1/2018
A4 1/3/2018
II. RESULT
So the result I want as belows:
1. The number of ID which appear in 2 consecutive months: 1 & 2/2018 is 2 (A1 & A3)
ID Month
A1 1/1/2018
A3 1/15/2018
A1 2/4/2018
A3 2/15/2018
2. The number of ID which appear in 3 consecutive months: 1, 2 & 3/2018 is 1 (A1)
ID Month
A1 1/1/2018
A1 2/4/2018
A1 3/1/2018
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