Posted by Alexander Kuznetsov on 02/14/06 18:01

I successfully used a transactional message queue for a similar
scenario.

Besides, try this:

create table #pins(id int identity, PIN decimal(10));
insert into #pins(PIN)values(1000000000);
insert into #pins(PIN)values(1000000001);
insert into #pins(PIN)values(1000000002);
go
create table #point_to_pins(id int identity)
go
---to get a PIN
insert into #point_to_pins default values
select @@identity

use @@identity to get the PIN, you will not get any collisions ever

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