Dropping observations based on a list of ID

[Kris James]

Hello,

Is there a way to drop observations using a list of IDs ? I have a dataset and there are several observations (about 20k) I need to drop. I have the ID of these observations but they are too long to paste in the command.

To give the context of this issue, I have two datasets, one of firms with different segments and one of all firms, I want to remove all multi-segment firms and get a dataset of only firms operating in only one industry segment.

Any advice is greatly appreciated! Thank you

[Clyde Schechter]

use data_set_with_all_firms, clear
merge 1:1 ID using data_set_of_firms_to_drop, keep(master) nogenerate

[Kris James]

use data_set_with_all_firms, clear
merge 1:1 ID using data_set_of_firms_to_drop, keep(master) nogenerate

This is exactly what I need. Thank you so much for the prompt response!