On Tue, Aug 10, 2010 at 02:16:26PM -0400, luis cota wrote:
> How can I ensure that there exists only one value for a given Date, ID pair?
In general, by creating a unique index on (date, id) pairs; you can
create the index directly in SQL or in SQLObject.
But in this particular case... you say ID - do you mean the primary key
for the table? Well, it's itself a unique key, you don't need to make
(date, id) pairs more unique.
Oleg.
--
Oleg Broytman http://phd.pp.ru/ [email protected]
Programmers don't die, they just GOSUB without RETURN.
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