Let's say I have a table:
table1
=====
subject_name text
subject_age int4
test_trial int4
test_score int4
I'd like to find out how many times a unique 'subject_name' is in the
table. My SQL book says that I should be able to do this:
select COUNT(DISTINCT subject_name) from table1;
However, the psql program is giving me an "ERROR: parser: parse error
at or near "distinct"".
Is there another way to do this (or a problem with my query)?
Thanks.
-Tony Reina
Using [PostgreSQL 6.5.1 on i686-pc-linux-gnu, compiled by gcc
egcs-2.91.66]