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Multiple look up

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Hello,

I have seven lookups in sequence, one after other if  match found update some flag column as Y  else update it as N and both the match and no match outputs has to flow to next lookup and  continue on with same logic  then finally write all those values to a table .

First thing came to my mind when i thought about the solution for this is to union the lookup match n no match and send it to next look up but my manager told not to do it in that way as it may affect performance.

How can I do this? I am not sure, are there any other component to do this?please advice


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