[ic] Detecting duplicate values in a database

[interchange-users@icdevgroup.org (Michael)]

On Tue, Sep 10, 2002 at 11:00:34AM -0400, Mike Heins wrote:
> Quoting Michael (mslack@g1.slackford.com):
> > I have run into a bit of a problem using a form to update a database.
> > 
> > I have one column in userdb that really needs to be a unique value on 
> > a record by record basis.  However it will not really be used as a key - it
> > simply cannot have duplicates.
> 
> 
> It would be easy to gen this up yourself.
> 
>   [set valid_form]
>      [tmp ref_num_used][strip]
> 	[query sql="select ref_num from userdb where ref_num = '[cgi ref_num]'"]
> 		[sql-code]
> 	[/query]
>      [/strip][/tmp]
>      [if scratch ref_num_used]
> 	[calc]
> 		delete $CGI->{ref_num}; 
> 	[/calc]
> 	ref_num=mandatory Value in use - Select another
>      [/if]
>   [/set]
> 
> Not tested, but you should get the idea.
 
Ginned up something quite close to the above... Success! 

Thanks for the slap upside the head ;-) and thanks for your time!

Michael