[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XML vs relational database
The so-called "rule 0" of relational databases *is* that all information has to be available in relational form, i.e. in queriable form. http://en.wikipedia.org/wiki/Codd's_12_rules Cheers, Tony. On Thu, 16 Aug 2007 13:19:25 +0100, Michael Kay <mike@s...> wrote: >> In a relational database, a standard query >> allows to retreive data, but does not allow to investigate >> the design of the database > > Not true. The SQL standard defines a standard set of tables that hold > metadata, ie. information about tables and columns. At any rate, it did > so > about 20 years ago which was the last time I looked. > > Michael Kay > http://www.saxonica.com/ -- Anthony B. Coates Senior Partner Miley Watts LLP Experts In Data UK: +44 (20) 8816 7700, US: +1 (239) 344 7700 Mobile/Cell: +44 (79) 0543 9026 Data standards participant: genericode, ISO 20022 (ISO 15022 XML), UN/CEFACT, MDDL, FpML, UBL. http://www.mileywatts.com/
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