Re: PRIMARY KEY

Hello,

Is it possible to redesign your table as follows:

create table Mod48_00_2007 (
ID text,
N_GEN serial not null,
FORMSTORE text,
COD_NOTATIO text,
PA_COGNOME text,
constraint pk_Mod48_00_2007 primary key (N_GEN)
);

Your insert simply becomes:
INSERT INTO MOD48_00_2007 (ID, FORMSTORE, COD_NOTAIO, PA_COGNOME) VALUES
('192168217200737122012', '', '00128', 'DE MARTINIS')

Do note that you do not refer to the N_GEN column, it will use the next
value, please refer to
http://www.postgresql.org/docs/8.1/interactive/datatype.html#DATATYPE-SERIAL
for more information.

Mario

Shavonne Marietta Wijesinghe wrote:
> Hello
>
> I have created a table
> CREATE TABLE MOD48_00_2007 ( ID text, N_GEN int PRIMARY KEY, FORMSTORE
> text, COD_NOTAIO text, PA_COGNOME text);
>
> And i insert the rows via a form in ASP. When the form loads i have a
> functin that goes and gets the value of the field N_GEN adds 1 to it
> and shows it to the user.
> The problem is when i have 2 users working at the same time.
>
> For example the last value in my field N_GEN is 2
> When both the users A and B loads the form (ASP page) it sees N_GEN = 3 :)
>
> So they fill in the form and user A clicks on the button OK and the
> record has been inserted with N_GEN = 3. But when the user B clicks on
> the button the record is not inserted because it has the same key "3"
>
> INSERT INTO MOD48_00_2007 (ID, N_GEN, FORMSTORE, COD_NOTAIO,
> PA_COGNOME) VALUES ('192168217200737122012', '3', '', '00128', 'DE
> MARTINIS')
>
> Is there any way i can do this automatically? i mean maybe i have to
> use someother property instead of "Primary Key" ??
>
> Thanks
>
> Shavonne Wijesinghe