Re: Nulls, integrity, the closed world assumption and events
From: Neo <neo55592_at_hotmail.com>
Date: 16 Jan 2007 13:37:54 -0800
Message-ID: <1168983471.869532.214700_at_38g2000cwa.googlegroups.com>
Date: 16 Jan 2007 13:37:54 -0800
Message-ID: <1168983471.869532.214700_at_38g2000cwa.googlegroups.com>
What is used to link the cars in the two files? Their name or some type of ID? Does splitting the data from one file to two affect existing queries, ie find all persons who have nissan and porshe? I assume a human splits the data from the single file to two files, or is it handled automatically by db itself?
Because dbd is highly systematic, it doesn't require a schema change by user or splitting of data to different tables/files by user and pre-existing queries are largely unaffected. For example the following query to find persons with nissan and porsche stays the same before and after the new data requirements:
(& (get * has nissan)
(get * has porsche)) Received on Tue Jan 16 2007 - 22:37:54 CET