Expression Issue

Hi All,
I am from a Informatica background and new to ODI. Its overwhelming for a newbie like me grasp this ELT concept. ODI version - 11g.
We are in process of loading data from MySQL to Oracle.
We are using LKM SQL to Oracle and IKM Oracle incremental Update. Can someone explain me how to put expressions in the interface?
Objective is to concatenate two fileds, first name(mysql column) and last name(mysql column) and move it into fullname column in oracle.
I know the place where to write the expression but what should i select source , staging , target and what are those radio buttons for ??
Thanks in advance .
-Ian.

Hi Ian,
You can write ur expression either in Source or Staging.
Source : Your expression/transformation will be executed while loading in to C$ table (LKM)
Staging : Your expression/transformation will be executed while loading in to I$ table (IKM)
Target : Your expression/transformation will be executed while loading in to target table (IKM) ideal place to "constant" and hard coded values (sysdate, 'Test Strings' etc)
Thanks,
Guru

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