#command cdx join -ktwo,float $TMP/aaa $TMP/bbb
#infile aaa
CDX one two three
aaa 3 ccc
zzz 3 qqq
ddd 20 fff
ggg 100 iii
#infile bbb
CDX uno dos two
bbb DDD 3
ddd FFF 4
ggg III 50
hhh JJJ 100
#stdout
CDX one two three uno dos
aaa 3 ccc bbb DDD
zzz 3 qqq bbb DDD
ggg 100 iii hhh JJJ