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low performance of SCD RRS feed

  • Question

  • hi,

    i have a dimension table containing about 20 millions records, and i would like to perform an SCD transform(both type 1 and type 2) on that dimension. the problem is that the column of SCD type 1 alway changes its value, so there will be nearly 20 millions(size of the input dataset) update statements executed one by one, which has a very very low performance.

    any suggestions will be appreciated.

     


    Andrew Chen
    Interested in BI related technologies
    Wednesday, October 6, 2010 8:03 AM

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