Not that I'm involved in building systems anymore but is there no longer required to use a sequence to guarantee a unique id for a record? On 20 January 2011 08:42, Dunbar, Norman (Capgemini) < norman.dunbar.capgemini@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Morning Michael, > > >> I believe I may have figured this out. I am using > >> current_timestamp. I believe that for a given moment in > >> time, this value could be different depending on the > >> location of the user. 'believe' because I'm not really sure. > > Current_timestamp is the "session" timestamp (actually, TIMESTAMP WITH > TIME ZONE) and as such can be duplicated due to the same time being hit > in two different timezones. > > > >> I think that if I change the default to SYSTIMESTAMP, the > >> local server timestamp will be populated. > > It will, regardless of where the users are located. SYSTIMESTAMP is > always the database server time. Unless you get really "lucky" you > shouldn't have duplicates. SYSTIMESTAMP is also a TIMESTAMP WITH TIME > ZONE. > > > > Cheers, > Norm. > > Norman Dunbar > Contract Senior Oracle DBA > Capgemini Database Team (EA) > Internal : 7 28 2051 > External : 0113 231 2051 > > > Information in this message may be confidential and may be legally > privileged. If you have received this message by mistake, please notify the > sender immediately, delete it and do not copy it to anyone else. > > We have checked this email and its attachments for viruses. But you should > still check any attachment before opening it. > We may have to make this message and any reply to it public if asked to > under the Freedom of Information Act, Data Protection Act or for litigation. > Email messages and attachments sent to or from any Environment Agency > address may also be accessed by someone other than the sender or recipient, > for business purposes. > > If we have sent you information and you wish to use it please read our > terms and conditions which you can get by calling us on 08708 506 506. Find > out more about the Environment Agency at www.environment-agency.gov.uk > -- > //www.freelists.org/webpage/oracle-l > > > -- Howard A. Latham Sent from my Nokia N97