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pandunallani
Contributor II

In real time how do u know join or keep or concatenate tables?

kindly anyone explain me about what scenario we use to combine tables in what case?

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Re: In real time how do u know join or keep or concatenate tables?

You combine tables if you must do so because

  • you need to do calculations that require fields from several source tables to be in one table
  • you experience performance problems with the current data model that can be solved by combining several tables and so create a more compact data model that's closer to a star schema data model.

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