Hi Kevin,
this example was for teaching AI students (with limited PostgreSQL
knowledge) in a very basic lecture -- I did not want to tweak the SQL
semantics too much; just demonstrate why SQL is rightfully called a 4GL
language. ;-)
Cheers, Nick
On 02/01/2011 10:08 PM, Kevin Grittner wrote:
Nick Rudnick<joerg.rudn...@t-online.de> wrote:
here an inelegant example
Based on that example, you should be sure to look at the INHERITS
clause of CREATE TABLE:
http://www.postgresql.org/docs/current/interactive/sql-createtable.html
PostgreSQL has the "is a" structure built in. That may not get you
all the way there, but between that and a few views, you might get
close without needing a lot of low level infrastructure work.
-Kevin
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