Answer / rayudu

Connected lookup is used to lookup on each and every row
bjut unconnected lookup is used to lookup only when the
condition is true i,e unconnetcec is used only for selectetd
rows so obviously unconnected is faster .


Regards,
rayudu.

Answer / yamini

Performance wise unconnected look up transformation is better as it returns only one port and doesn't build any dynamic cache. Only static cache is build. It can be used any where in the mapping using LKP expression in another transformation.

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