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This is with respect to the DW Design.

Published
  • January 25 2002, 1:00am EST

Q:

This is with respect to the DW Design. Currently all our reports retrieve the measures using the SELECT DISTINCT clause even though the Fact table has the primary key. Is this the normal approach? Are there any design issues or any access approaches we should consider?

A:

Chuck Kelley’s Answer: Almost all reporting/query tools do a select distinct. While I don’t agree with it, the correct results are produced for the end user and so it works. That is all you can ask of a product is that it works as advertised. Remember that the design needs to make sure that there will be no duplicates in the “fact” table, making the DISTINCT useless. If you have a bad design, then it needs to be fixed not have the tool “fix” it for you.

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