������ ����� wrote:
>
> Hi all!
>
Hi,
> Sorry for the dumb question, but am I right in the following suggestion:
>
> I have the following table:
>
> create table tab_1 (
> field_1 integer not null,
> field_2 integer not null,
> primary key (field_1, field_2));
>
> Does it mean that this key requires unique COMBINATION of field_1 and
> field_2? For example, at first I add:
Yes
>
> insert into tab_1 values ('2', '3');
> insert into tab_1 values ('3', '4');
>
> Then I'd like to add the following:
>
> insert into tab_1 values ('3', '2');
>
> Here field_1 is NOT unique, but combination of field_1 and field_2 IS
> unique. Will I get an error in this case?
No
>
> Thanx for the answers!
>
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Regards
--
Joseph Bueno
NetClub/Trader.com
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