Need Suggesion for the below logic

Question

Hi Experts,
i have a 6 fields a,b,c,d,e,f in the source and in the target i have one field k
My mapping requirement is
if a =1 then K =b
suppose if b is blank
then k=c
suppose if c is blank
then k = d
suppose if d is blank
then k = e
suppose if e is blank
then k=f
In the mapping i wrote a decode function as below
decode ( a = '1',b,
              (a='1' and b = ' '),c,
             (a='1' and c = ' '),d,
            (a='1' and d = ' '),e,
            (a='1' and e = ' '),f,null)
My problem is when the first field i.e if b is blank, i should get c values, i am using 4.1 version, i am not getting expected
Any Suggesion please
Thanks
Madhu

Answer 1

The Data types A is int
B,C,D,E,F are varchar (30)
K is varchar(40)
The requirement is
if A =1 then K =B
suppose if B is blank
then K=C
suppose if C is blank
then K = D
suppose if D is blank
then K = E
suppose if E is blank
then K=F
Out of 5  fields--B,C,D,E,F . K value should be the first value out of these 5 fields in the Order B ,C, D, E, F which is not blank
Please let me know if you did not understand
Thanks
Madhu