I assume you mean about NULL values and three-valued logic? my favorite book is still "Relational Batabase Writings, 1989 - 1991" by C.J. Date and Hugh Darwen, ISBN 0-201-54303-6. check out chapters 13, 17, 18, and 21. Then there is the famous "Database Systems" (8th edition) by Chris Date, but it is a rather thick book with only one chapter about missing information. hope this helps, Lex. --------------------------------------------- visit my website at http://www.naturaljoin.nl --------------------------------------------- -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Ryan Sent: Saturday, May 29, 2004 20:33 To: oracle-l@xxxxxxxxxxxxx Subject: Re: Useful Oracle books - C.J. Date theory vs. practicality Lex, Do you have any papers on the web or in books in English? I went to your website and did a google search. I couldn't find any? ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------
BEGIN:VCARD VERSION:2.1 N:de Haan;Lex FN:Lex de Haan ORG:Natural Join B.V. TEL;WORK;VOICE:+31.30.2515022 TEL;HOME;VOICE:+31.30.2518795 TEL;CELL;VOICE:+31.62.2955714 TEL;WORK;FAX:+31.30.2523366 ADR;WORK:;;Pieter Breughelstraat 10;Utrecht;;3583 SK;Netherlands LABEL;WORK;ENCODING=QUOTED-PRINTABLE:Pieter Breughelstraat 10=0D=0AUtrecht 3583 SK=0D=0ANetherlands URL;WORK:http://www.naturaljoin.nl EMAIL;PREF;INTERNET:lex.de.haan@xxxxxxxxxxxxxx REV:20040224T160439Z END:VCARD