Re: Re: [SQL] MAX() of 0 records.

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От Philip Warner
Тема Re: Re: [SQL] MAX() of 0 records.
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Msg-id 3.0.5.32.20000710102430.009bf510@mail.rhyme.com.au
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Ответ на Re: [SQL] MAX() of 0 records.  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: Re: [SQL] MAX() of 0 records.  (Tom Lane <tgl@sss.pgh.pa.us>)
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At 14:35 9/07/00 -0400, Tom Lane wrote:
>
>so the construct is definitely not SQL-compliant.  Maybe we should just
>forbid it.  However, if you are joining against another table (which
>itself is not an SQL feature) then it seems like there is some potential
>use in it.  What do people think of my implicit-GROUP-BY-ctid idea?
>That would basically say that the aggregate is computed over all the
>tuples that join to a single target tuple.

Sounds perfect to me...


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