Re:

On Tue, Apr 19, 2005 at 01:27:09PM -0700, Zuoxin(dot)Wang(at)kp(dot)org wrote:

> test=# select used from patient;
> used
> ------
> N
> N
> (2 rows)

Try

select '{' || used || '}' from patient;

> test=# select first_name, last_name, used, birthday from patient;
> first_name | last_name | used | birthday
> ------------+-----------+------+------------
> | 1960-02-01DI | N
> | 1960-02-01DI | N
> (2 rows)

Looks like you have some non-printable character in the used column.

--
Alvaro Herrera (<alvherre[(at)]dcc(dot)uchile(dot)cl>)
"La conclusión que podemos sacar de esos estudios es que
no podemos sacar ninguna conclusión de ellos" (Tanenbaum)