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De
15/02/1999 05:23:23
 
 
À
08/02/1999 16:28:50
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Autre
Titre:
Re: Teaser
Divers
Thread ID:
00185277
Message ID:
00187614
Vues:
20
Wishing all a Happy Lunar New Year and all the best for the
years to come.

Michael, would you care to explain to me what is and the diff.
between NC(non-cluster) indexes and cluster indexes. Thanks.


>Since there's no activity here maybe I can generate some...
>This is a favorite of mine. First, without trying it, which query would you expect to generate more IO:
>SELECT MIN(column1), MAX(column1) FROM table
>SELECT MIN(column1), (SELECT MAX(column1) FROM table) FROM table
>IMPORTANT: It only works on 6.5 and there must be an NC index on column1!!!
>After you've guessed, run both queries. Don't forget to SET STATS IO ON to get the IO counts.
>Have fun
>-Mike
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