outer join in unix with 2 files

$ grep -v -f file1 file2

I think the -f option is not standard So only GNU grep
understands this.

Stephane

This works great for a small file1 but if file2 is big

we have this error --> list too large

:(

why not use join.  input must be sorted, so first,
  sort -n -o file1 file1
  sort -k 3n -o file2 file2
and then
  join -t ' ' -j1 1 -j2 3 -o 2.1,2.2,2.3 file1 file2

For those of us not overly fond of the bourne/ksh shell:

foreach i (`cat file1`)
  grep $i file2 >&/dev/null
  if( $status != 0 ) echo $i >>result_file
end

or if file1 is large

split file1
foreach x (x??)
  foreach i (`cat $x`)
    grep $i file2 >&/dev/null
    if( $status != 0 ) echo $i >>result_file
  end
  rm $x
end

Yeah, but it's hard to find aanyone who recommends programming in csh.  It's fine for "interactive" work but an abomination when one wants to do serious processing.

Like this?
join -1 1 -2 3 file1 file2 -v 2