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:

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