Posted by Jeff Kish on 10/06/05 16:18

On 6 Oct 2005 03:53:10 -0700, "David Portas"
<REMOVE_BEFORE_REPLYING_dportas@acm.org> wrote:

>In this case the key makes a difference to the extent that my DELETE
>statement will delete "mirrored" rows but won't delete all duplicates
>(all three columns identical). For that you would need a key, a cursor
>or an intermediate table. Also, my DELETE won't remove rows with NULLs,
>which I can see may be an issue now that you've posted DDL with
>nullable columns.
>
>In any case, it makes sense to include keys with your DDL or to state
>that your table doesn't have a key. Keys and constraints can make a big
>difference to the solution.
>
>--
>David Portas
>SQL Server MVP
I understand completely. Thanks for the edifications.
(that's what we're here for, eh?)
Cheers

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