How to Ignore records having duplicate field value

Hi,
I have a fixed length flat file having multiple records.
Ex:
1000423421A8090
1000802421A8091
1000454421B8092
1000412421C8093
The first 2 record has A. So I have to take only one out of first two record and ignore the second one. I mean if there is any duplicate field at 11th position then I have to select only one record.
Can you please let me know how to handle this.
Thanks
Mukesh

Mukesh,
Use the following UDF to achieve the same.
getchar
char ret = Values.charAt(10);
return ""ret"";
Maptarget
//write your code here
int len = Values.length;
String char_at="";
String pos="";
for(int j=0;j<len;j++)
if(j==0){
result.addValue(Values[j]);
else
char_at= ""+ Values[j-1].charAt(10);
pos=""+Values[j].charAt(10);
if(!char_at.equals(pos))
result.addValue(Values[j]);
Mapping Logic
1. Use sort by key function
in the first parameter map - Source -UDF(getchar)
in the second parameter map -Source
2.Map the output of sortbykey to UDF(Maptarget)
3.Finally Map the o/p of UDF to target.
I checked it, its working as per your reqmt.
If you have any doubts reply me I'll help you out.
Note: In UDF(MapTarget) use Queue
Best Regards,
Raj.

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Ah, that explains why I can't see it then :)
Is LightSwitch or SQL throwing the error?
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