#command cdx join -ktwo,float $TMP/aaa $TMP/bbb
#infile aaa
 CDX	one	two	three
aaa	3	ccc
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
ggg	100	iii	hhh	JJJ