On Tue, 27 Oct 2009 10:54:06 +
Richard Huxton d...@archonet.com wrote:
Association between email and password is just meant to build up
a queue for mailing and there is no uniqueness constraint on
(password, email) pair.
create table pw_email(
password varchar(16),
email
On Wed, Oct 28, 2009 at 4:50 AM, Ivan Sergio Borgonovo
m...@webthatworks.it wrote:
To have the 3rd constraint I'd have a table:
create table pw_res(
password varchar(16) primary key,
res int references resources (res) on delete cascade
);
This comes handy for 2 reasons:
- it helps me to
On Wed, 28 Oct 2009 10:12:19 -0500
Peter Hunsberger peter.hunsber...@gmail.com wrote:
The first approach requires a distinct/group by that may be
expensive.
The second one requires I keep in memory all the emails while the
first statement run.
Unless you're dealing with 100,000's of
