How to copy only lines by mask to a new file?

Question

vim

There is a csv file. 4000 lines. 20 columns. One of the columns has both numeric 11-digit format strings and text strings.
How can I use vim or just bash to find and copy lines with numeric content into a new file?

Answer 1

You can also use awk:
where N= 2 is the number of the desired column
-F";" - in quotation marks specify the column separator