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Message Posted: Wed, 05 Aug 2015 @ 19:05:35 GMT

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Subj:   Re: NoPI tables as Staging tables
From:   Anomy Anom

<-- Anonymously Posted: Wednesday, August 05, 2015 13:46 -->

Thanks Dave. I believe the point is made.

However, I have another related question and will ask as part of this thread since I do not want to create another new topic.

Question -

I have a table as below :-

     ,start_date DATE NOT NULL
     ,end_date DATE NOT NULL

Users often fire queries which involves a date range based on both start_date and end_date together or either as shown below


     select *
       from t1
       where start_date >= '01/01/2015' and end_date < '06/30/2015';


     select *
       from t1
       where start_date >= '01/01/2015';

Will it be wise to create a NUSI on start_date and end_date to elevate query performance? Please indicate if 2 separate single column NUSI is preferred or 1 composite NUSI comprising both start_date & end_date is advisable. Also is using a Range based PPI useful in this instance?


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