Re: Interesting article: In the Beginning: An RDBMS history
Date: Mon, 3 Apr 2006 14:46:00 +0300
Message-ID: <e0r1t6$7ob$1_at_emma.aioe.org>
"paul c" <toledobythesea_at_oohay.ac> wrote in message news:GX_Wf.201803$sa3.143853_at_pd7tw1no...
> Also read somewhere that nowhere does it mention 'relations'. Is
> anybody able to confirm this?
>>5WD-02-Foundation-2003-09:
I don't know about the standard but the working drafts are full of
"relationships" :-)
>>5WD-01-Framework-2003-09:
In other cases, certain SQL objects cannot exist unless some other SQL
object exists, even though there is no
inclusion *relationship*. For example, SQL does not permit an assertion to
exist if some table referenced by the
assertion does not exist.
>>5WD-11-Schemata-2003-09:
The DIRECT_SUPERTYPES base table contains one row for each direct
subtype-supertype *relationship*.
>>5WD-10-OLB-2003-09:
>>5WD-14-XML-2003-09:
mapped to these elements and do not have a named type in the *relational*
domain. We are of
the opinion that this should be preserved in the mapping and lead to
anonymous complex types
in the generated XML Schema.
Received on Mon Apr 03 2006 - 13:46:00 CEST
The DIRECT_SUPERTABLES base table contains one row for each direct
subtable-supertable *relationship*.
JDBC provides a complete, low-level SQL interface from Java to *relational*
databases.
XML elements are a kind of types. Tables as specified in this paper in the
*relational* world are