#command cdx join -k2.3,float $TMP/aaa $TMP/bbb
#infile aaa
aaa	3	ccc
ddd	20	fff
ggg	100	iii
#infile bbb
bbb	DDD	3
ddd	FFF	4
ggg	III	50
hhh	JJJ	100
#stdout
aaa	3	ccc	bbb	DDD
ggg	100	iii	hhh	JJJ