#command cdx join -k1 $TMP/aaa $TMP/bbb -a 2,$TMP/bar -a 1,- -f $TMP/foo
#infile aaa
CDX one two three
aaa bbb ccc
ddd eee fff
ggg hhh iii
#infile bbb
CDX uno dos tres
bbb CCC DDD
ddd EEE FFF
ggg HHH III
hhh III JJJ
#outfile foo
CDX one two three dos tres
ddd eee fff EEE FFF
ggg hhh iii HHH III
#stdout
CDX one two three
aaa bbb ccc
#outfile bar
CDX uno dos tres
bbb CCC DDD
hhh III JJJ