Gnu/coreutils/Set-operations
From Get docs
Previous: Header lines, Up: join invocation [Contents][Index]
8.3.6 Union, Intersection and Difference of files
Combine sort
, uniq
and join
to
perform the equivalent of set operations on files:
Command | outcome |
---|---|
sort -u file1 file2
|
Union of unsorted files |
uniq -d | Intersection of unsorted files |
uniq -u | Difference of unsorted files |
uniq -u | Symmetric Difference of unsorted files |
join -t -a1 -a2 file1 file2
|
Union of sorted files |
join -t file1 file2
|
Intersection of sorted files |
join -t -v2 file1 file2
|
Difference of sorted files |
join -t -v1 -v2 file1 file2
|
Symmetric Difference of sorted files |
All examples above operate on entire lines and not on specific fields:
sort
without -k
and join -t
both consider
entire lines as the key.