how should I do if I want to pick out the userID with 1 row only. For example
USerID Long Lat Count
001 1 1 20
001 2 2 1
002 3 3 5
003 4 4 20
003 5 5 6
004 6 6 9
I need to pick out the userID 002 and 004 and keep all attributes
Best answer by takashi
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