Charlotte Foust
cfoust at infostatsystems.com
Thu May 6 11:13:49 CDT 2004
Remember, autonumbers don't *have* to be > 0! <VBG> Charlotte Foust -----Original Message----- From: Brett Barabash [mailto:BBarabash at tappeconstruction.com] Sent: Thursday, May 06, 2004 8:01 AM To: 'Access Developers discussion and problem solving' Subject: RE: [AccessD] AutoNumber To Start From 900120 Hmm... Didn't know that. Good to know. But what if you have 4,294,967,297 records in your table? Then you would run into a primary key conflict when the autonumber reaches 1 again. Talk about shoddy programming practices! P.S. For the humor impaired, that was a joke. P.P.S. If you don't know why that was a joke, try inserting 4 billion records into an Access table. -----Original Message----- From: Jim Dettman [mailto:jimdettman at earthlink.net] Sent: Thursday, May 06, 2004 10:51 AM To: Access Developers discussion and problem solving Subject: RE: [AccessD] AutoNumber To Start From 900120 <<When I asked him why, he told me that he needed to reset the autonumber so he doesn't reach the upper limit (2,147,483,647). I told him that he needed to brush up on his math skills; that apparently he had no concept of how much a billion was.>> Well besides the math, Autonumber will wrap to a negative value after that and come back to 0. You can never run out. Jim (315) 699-3443 jimdettman at earthlink.net -----Original Message----- From: accessd-bounces at databaseadvisors.com [mailto:accessd-bounces at databaseadvisors.com]On Behalf Of Brett Barabash Sent: Thursday, May 06, 2004 10:13 AM To: 'Access Developers discussion and problem solving' Subject: RE: [AccessD] AutoNumber To Start From 900120 I had a coworker who used autonumber fields in a few of his temp tables, who actually used DAO code to remove and re-add the field to his table. When I asked him why, he told me that he needed to reset the autonumber so he doesn't reach the upper limit (2,147,483,647). I told him that he needed to brush up on his math skills; that apparently he had no concept of how much a billion was. Last I heard, he was pursuing a career in politics ;-) -----Original Message----- From: John W. Colby [mailto:jwcolby at colbyconsulting.com] Sent: Thursday, May 06, 2004 9:01 AM To: Access Developers discussion and problem solving Subject: RE: [AccessD] AutoNumber To Start From 900120 >if some specific value of an AutoNumber field is important then the AutoNumber field is not being used properly (this is an old hobby horse of mine). Amen. OTOH I have had to "reset" the autonumber many times, to a value larger than the last one used, because something as happened to reset the autonumber back down to an invalid value. I was simply answering the question. I figured I'd leave the soap box to someone else for once. ;-) John W. Colby www.ColbyConsulting.com -----Original Message----- From: accessd-bounces at databaseadvisors.com [mailto:accessd-bounces at databaseadvisors.com]On Behalf Of Heenan, Lambert Sent: Thursday, May 06, 2004 9:42 AM To: 'Access Developers discussion and problem solving' Subject: RE: [AccessD] AutoNumber To Start From 900120 Quite a few replies to this question, but I'm surprised that nobody has mentioned that if some specific value of an AutoNumber field is important then the AutoNumber field is not being used properly (this is an old hobby horse of mine). An AutoNumber field is supposed to uniquely identify a specific row in a table. That's all. The user's need not ever see or know the value of such an AutoNumber field, it's used by the database to link related tables together. If the value of an AutoNumber field is important to a user then it is being given some other meaning, and that's only going to cause problems down the line. In effect you are storing two pieces of information in one field, and that's contrary to the normalization principals we should all at least be aware of. Even Microsoft seem to have woken up to this as A2K+ no longer reset AutoNumber's on compacting (thanks for testing that John). Just my 2 cents. Lambert > -----Original Message----- > From: Jim Hewson [SMTP:JHewson at karta.com] > Sent: Thursday, May 06, 2004 9:22 AM > To: Access Developers discussion and problem solving > Subject: RE: [AccessD] Autonumber To Start From 900120 > > > Issue? I thought that was feature. > > -----Original Message----- > From: accessd-bounces at databaseadvisors.com > [mailto:accessd-bounces at databaseadvisors.com]On Behalf Of John W. > Colby > Sent: Thursday, May 06, 2004 8:23 AM > To: Access Developers discussion and problem solving > Subject: RE: [AccessD] Autonumber To Start From 900120 > > > Uhh... yep. At least in A2K and earlier. AXP doesn't seem to do > that. In fact I just tested in A2K SR1 and it isn't resetting the > autonumber either, > so a service pack may have fixed that. But it definitely used to be an > issue so be careful. > > John W. Colby > www.ColbyConsulting.com > > -----Original Message----- > From: accessd-bounces at databaseadvisors.com > [mailto:accessd-bounces at databaseadvisors.com]On Behalf Of Jim DeMarco > Sent: Thursday, May 06, 2004 8:47 AM > To: Access Developers discussion and problem solving > Subject: RE: [AccessD] Autonumber To Start From 900120 > > > Yes this will work. One caveat though: do not compact the db until > you've got the seed number you want inserted. Compacting will reset > the autonumber. > > Jim DeMarco > > -----Original Message----- > From: John W. Colby [mailto:jwcolby at colbyconsulting.com] > Sent: Thursday, May 06, 2004 8:45 AM > To: Access Developers discussion and problem solving > Subject: RE: [AccessD] Autonumber To Start From 900120 > > > One way that works with all versions of Access (AFAIK) is to append in > a dummy record specifying a value one less than the number you want. > Then go in and delete that record. The next record will pick up with > the next value > (assuming an incrementing autonumber) > > John W. Colby > www.ColbyConsulting.com > > -----Original Message----- > From: accessd-bounces at databaseadvisors.com > [mailto:accessd-bounces at databaseadvisors.com]On Behalf Of > paul.hartland at fsmail.net > Sent: Thursday, May 06, 2004 8:25 AM > To: accessd > Subject: [AccessD] Autonumber To Start From 900120 > > > To all, > Is there a way of telling the Autonumber where to start from in a > Database ? Thanks in advance. > Paul > > -- ------------------------------------------------------------------------ -------------------------------------------- The information in this email may contain confidential information that is legally privileged. The information is only for the use of the intended recipient(s) named above. If you are not the intended recipient(s), you are hereby notified that any disclosure, copying, distribution, or the taking of any action in regard to the content of this email is strictly prohibited. If transmission is incorrect, unclear, or incomplete, please notify the sender immediately. The authorized recipient(s) of this information is/are prohibited from disclosing this information to any other party and is/are required to destroy the information after its stated need has been fulfilled. 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