Re: help w/ query

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От Andrew Gould
Тема Re: help w/ query
Дата
Msg-id 20011023215102.33475.qmail@web13402.mail.yahoo.com
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Ответ на help w/ query  ("G.L. Grobe" <gary@grobe.net>)
Список pgsql-general
The relationship between B.id and B.pid is not
specific enough to accomplish your goal.  You need to
modify your data model.  Without understanding the
purpose your database and the meaning of its fields,
it's hard to give more specific guidance.

Best of luck,

Andrew

--- "G.L. Grobe" <gary@grobe.net> wrote:
> Anyone help w/ the following sql query ... Here's my
> tables ...
>
> table A
> id      name
> -----|-------
> 1000 AA
> 1001  AB
> 1002 AC
> 1003 AD
>
> table B
> id  pid
> -----|-------
> 1000 1000
> 1001 1000
> 1002 1000
> 1003 1001
> 1004 1001
>
> Here's my query, (note that 'AA' is all the info I
> provide,
> cause that's the ) ...
>
> SELECT B.id FROM B, A WHERE B.pid = A.id AND A.name
> = 'AA';
>
> Returns the following resultset ...
>
> id (note, this is from B, but all have pid's of
> 1000)
> ------
> 1000
> 1001
> 1002
>
> When what I really want returned is the 1000 from
> B's table
> and only that record ...
>
> id (note, this is what I want from B)
> ------
> 1000
>
> Any idea how to grab this?
>
> TIA

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