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Message Posted: Thu, 07 Jun 2007 @ 15:42:03 GMT

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If the large fat table contains many columns sharing the same values across mulitple rows, then a lookup table may be the way to go.

Eg

Fat table

     col1   col2   col3   col4 col5   etc.....
        1      1      1      1    2
        1      1      1      1    3
        1      1      1      1    4
        2      1      1      1    2
        2      1      1      1    3
        2      1      1      1    4
        2      1      1      1    5

Look up table

     Unique_ID col1   col2   col3   col4
     100          1      1      1      1
     200          2      1      1      1
     300          3      1      1      1

Thereby reducing the width and physical size of the fat table

New Fat table

     Unique_ID   col5 ......
     100           2
     100           3
     100           4
     200           2
     200           3
     200           4

Regards

Di

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