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  • INTERVIEW QUESTIONS DATA WAREHOUSING DETAILS
    Question :
    Which is better among connected lookup and unconnected lookup transformations in informatica or any other ETL tool?
    Category Data Warehousing Interview Questions
    Rating (0.4) By 1804 users
    Added on 8/26/2009
    Views 1641
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    Answers:

    f you are having defined source you can use connected, source is not well defined or from different database you can go for unconnected
    We are using like that only



    One reason can be in Connected lookup for non matching columns it returns default value for output port to target, whereas in unconnected lookup for non-matching columns we get NULL as output.



    Posted by: Amit    

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