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AW: InstantDB: SQL syntax question


Sehr geehrter Herr Herbst,

vielen Dank für die Übermittlung der Com!Online-Seite. Das hat mich auch
sehr gefreut. Insbesondere weil Ihre Inhalte sicherlich zu den besten im
Finanzbereich gehören.

Viele Grüße

Michael Kastner

-----Ursprüngliche Nachricht-----
Von: owner-instantDB@enhydra.org [mailto:owner-instantDB@enhydra.org]Im
Auftrag von Good, David
Gesendet: Donnerstag, 19. Oktober 2000 11:51
An: 'instantDB@enhydra.org'
Betreff: RE: InstantDB: SQL syntax question


Cindy

You could use:  WHERE (aColumn = ?) AND (zColumn = aColumb)

David

-----Original Message-----
From: Bill Karwin [mailto:bill.karwin@lutris.com]
Sent: 18 October 2000 18:36
To: instantDB@enhydra.org
Subject: Re: InstantDB: SQL syntax question


Cindy Tipper wrote:
>
> I've poured over the IDB syntax and can't seem to figure this one out,
> but perhaps it is due to a limited knowledge base of SQL....
>
> I want to write a query of the form:
>   SELECT * FROM myTBL WHERE (aColumn OR zColumn)=?

(<col> OR <col>) = <expr> is not legal SQL.  A bare <col> by itself is
not a valid boolean predicate, so it can't be combined with OR as a
boolean term in a search condition.

It's actually an ambiguous construction.  Would the condition be met if
<expr> is equal to the value of either <col>?  Or would the condition be
met if the boolean state of <expr> is the same as the state of the
boolean expression <col> OR <col>?

I know how _you_ want to use it today, but someone else might want the
other meaning.

--
Bill Karwin (bill@lutris.com)
Application Architect - Lutris Technologies Inc.
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