Fascinating discussion - thanks to all who have contributed to a most readable thread. 1 - on books - I grab any I can, on basis (and experience) that no one text will answer every question. 'Two heads better than one', etc. Then apply ones' judgement. 2 - on Date. If you can stand the somewhat hectoring style of Fabian Pascal (which I find quite tedious, I'm afraid), Chris Date has a number of papers and discussion notes on Pascal's web site (www.dbdebunk.com). peter edinburgh ********************************************************************* This e-mail message, and any files transmitted with it, are confidential and intended solely for the use of the addressee. If this message was not addressed to you, you have received it in error and any copying, distribution or other use of any part of it is strictly prohibited. Any views or opinions presented are solely those of the sender and do not necessarily represent those of the British Geological Survey. The security of e-mail communication cannot be guaranteed and the BGS accepts no liability for claims arising as a result of the use of this medium to transmit messages from or to the BGS. . http://www.bgs.ac.uk ********************************************************************* ---------------------------------------------------------------- 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 http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------