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Posted by Jerry Stuckle on 07/16/07 19:34
Toby A Inkster wrote:
> Jerry Stuckle wrote:
>
>> Looks like I need to get an updated version of the SQL standard then.
>> The one I have doesn't indicate double quotes are legal. Can you point
>> me to the section in the ANSI standard which shows that? It would save
>> me a lot of looking - these things are not the easiest to read :-).
>
> ANSI SQL 1992, section 5.2 indicates the syntax for "tokens", by which it
> means the identifiers you use to refer to tables and columns (and views
> and various other things).
>
> It defines a "delimited identifier" as consisting of a double quote,
> followed by a "delimited identifier body" followed by another double
> quote. The definition of the "delimited identifier body" is quite
> convoluted but it ends up saying that it can be any sequence of one or more
> characters, but internal double-quotes need to be escaped by doubling them
> up. e.g. the following are legal delimited identifiers:
>
> "foo"
> "foo bar"
> "foo""bar"""
>
> You can be entirely forgiven for not having spotted this though -- SQL
> 1992 is over 600 pages of seemingly opaque jargon with, as far as I can
> tell, not a single syntax example given. It really makes you appreciate W3C
> specs and the PHP manual!
>
Thanks, Toby. And yes, I do have SQL92, and I agree - it's worse than
IBM technical manuals! :-)
--
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Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
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