Remove firms from dataset

[Massimo Giudici]

Hi, i'm new to Stata and i'm trying to learn.
I have a data set and would like to remove certain firms: firms are identified by the SIC variable.
I would like to remove all firms between 4900-4999 and 6000-6999
How does the code look?
Thank you,
Massimo

[Rich Goldstein]

not clear whether SIC is numeric or string so choose one of the following:

drop if inrange(SIC,4900,4999) | inrange(SIC,6000,6999)
drop if inrange(SIC,"4900","4999") | inrange(SIC,"6000","6999")

[Massimo Giudici]

The second works! Thank you