select A.COLA,B.COLB,C.COLC.D.COLD
from A
left outer join B on A.COLA=B.COLB
left outer join C on A.COLA=C.COLB
left outer join D on A.COLA=D.COLB
from A
left outer join B on A.COLA=B.COLB
left outer join C on A.COLA=C.COLB
left outer join D on A.COLA=D.COLB
from A
left outer join B on A.COLA=B.COLB
left outer join C on A.COLA=C.COLC
left outer join D on A.COLA=D.COLD
from A
left outer join B on A.COLA=B.COLB
left outer join C on A.COLA=C.COLC
left outer join D on A.COLA=D.COLD
from A left outer join B
on A.COLB=B.COLB
left outer join C
on A.COLC=C.COLC
left outer join D
A.COLD=C.COLD
from A left outer join B
on A.COLB=B.COLB
left outer join C
on A.COLC=C.COLC
left outer join D
A.COLD=D.COLD