Hi, I have a dataframe of over 6000 observations for 250 client ID's with one of the columns being "Date". I want to pull the the ID's that have any duplicate dates
For instance, my dataset looks like:
ID Date
100 1/1/2020
100 1/2/2020
100 1/4/2020
100 1/4/2020
101 1/1/2020
101 1/1/2020
101 1/2/2020
101 1/4/2020
102 1/1/2020
102 1/2/2020
.......................
And I'm looking to get:
ID Date
100 1/4/2020
100 1/4/2020
101 1/1/2020
101 1/1/2020
This is getting me stuck for some reason.
Thank you!!