Re: duplicates

yes i understand that i can create a primary key/unique etc...
however my question is if i have to understand if and why
the i got duplicate rows inserted.
so here is the picture:
an application is deleting rows and inserting right after that
new ones some of which are the same as the old one,and i am getting
duplicates !Don't transaction should prevent this by not letting
insert ot do something in case the delete did not succeed?
Another option is that i have to clients deleting and then inserting the
same thing into table ,but again should not transaction prevent duplicates
in that case ?

> Use something like this:
>
> CREATE TABLE schedule (
> id serial PRIMARY KEY,
> studentid decimal(9),
> groupid decimal(10),
> maslulsignid decimal(7),
> tfusot varchar(29)
> );
>

--
Evgeny.