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Look Up in Data Services

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Hi All,

 

Could you please help me on how to achieve below scenario.

 

I have two source Tables.

 

Table A, Table B.

 

required O/p:

 

Query Table B based on one field from Table A.

 

If it returns any entry populate that value in to target otherwise populate same column from Table A.

 

 

Could you please let us know how to acieve by using Look Up funcitions?.

 

As we have 3 look up functions, look up(), look up_ext(), look up_seq()

 

Which one we have to use here.

 

Regards.


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