It will perform the update regardless of current value of the column. The value checking is only done if
1. You have specified a where clause 2. There is a check constraint that would require such check 3. You have a explicit condition check in pre or post update trigger that would require it. Raj ______________________________________________________ Rajendra Jamadagni MIS, ESPN Inc. Rajendra dot Jamadagni at ESPN dot com Any opinion expressed here is personal and doesn't reflect that of ESPN Inc. QOTD: Any clod can have facts, but having an opinion is an art! -----Original Message----- Sent: Monday, April 08, 2002 9:23 AM To: Multiple recipients of list ORACLE-L Deart gurus ! I'm just wondering what happens in this situation : i issue the following SQL : update AAA set BBB=0 where ROWID='XXXXXXXXX' ; Now , if the value of the BBB column is already 0 for the given row (or a set of rows) , what will actually happen behind the curtains ? I mean, will Oracle somehow detect that actually the update does not need to occur , or will it perform the update regardless of the current values of the columns . Thanks a lot, DBAndrey -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Andrey Bronfin INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
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