How to unique by column large file via sort command?

Question

i have large list (6 million lines) and want to sort unique by column #2, how to do it by sort command? In example

CONT,000-00-0000,GRAM
BEVE,507-66-6876,IGHT
MICH,000-00-0000,EVINS
CONT,111-11-1111,GRAM

trasnfer to

CONT,000-00-0000,GRAM
BEVE,507-66-6876,IGHT
CONT,111-11-1111,GRAM

Does this answer your question? [Is there a way to 'uniq' by column?](https://stackoverflow.com/questions/1915636/is-there-a-way-to-uniq-by-column) — Wiktor Stribiżew, Sep 29 '21 at 10:11

score 1 · Accepted Answer · answered Sep 29 '21 at 06:11

1

$ awk -F, '!array[$2]++' input_file
CONT,000-00-0000,GRAM
BEVE,507-66-6876,IGHT
CONT,111-11-1111,GRAM

answered Sep 29 '21 at 06:11

HatLess

1 Answers1