Answer Posted / guest

Let suppose the data are as these fields
A B C D
1000,null,null,null
null,2000,null,null
null,null,3000,null
null,null,null,4000

In the mapping take A,B,C,D as input ports.set 4 output
ports for the same 4 input ports like out_A,out_B,out_C,out_D.

For out_A output port set value like-IIF(ISNULL(A),1000,A).
Similary for out_B-IIF(ISNULL(B),2000,B)
likewise for C,D.

if you don't want to hard code 1000,2000 in the expressions
written above just create 4 variable port like
var_A,Var_B,var_C,var_D before creating the output ports and
each variable port set max(A) for var_A,max(B) for var_B
port likely.

put each variable port name against 1000,2000,3000 and 4000
in respective expression.
as example for out_A set IIF(ISNULL(A),var_A,A)

Now take 4 output ports to a aggrerator transformation.set
group by any one port but not all ports at a time.

Join the ports to target.

Hurry you get result like this

1000,2000,3000,4000

Regards

Sukanta

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