Answer / jai

Lookup defination SAP BW:
· Concept of Lookup is same in SAP BW as other Data warehousing tools .
For performing lookup a key column with the source BW table and lookup table must match.
· Lookup table can be any SAP BW infoproviders (like, DSO , MD table,Fact table etc.)
· If the key columns in source or result package are matched with the lookup table key column then those corresponding rows will only be passed to output Target. Others can be taken in reject.
We need to pass a key column from source table and we will get the required data once the key column matches
Technique to use lookup concept in BW:
Lookup normally we can do in Start routine, Field level Routine and in End routine.
In this document we will explain
· lookup through Start and Field routine
· Lookup through END routine

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