On Nov 20, 2006, at 12:27 PM, Wm.A.Stafford wrote:
I guess I should have been a bit more specific. Here is an example
of the type of query I'm finding in the Oracle app and the results
of my attempt to find a PostgreSQL equivalent.
select count(unique 'source_id') from obis_sources;
pgAdmin III query responds:
ERROR: syntax error at or near "'source_id'" at character 23
select count(distinct 'source_id') from obis_sources;
pgAdmin III query responds:
ERROR: could not identify an equality operator for type "unknown"
The single quotes are confusing things here, it treats 'source_id' as
a literal string instead of a column name. Try it without the quotes:
select count(distinct source_id) from obis_sources;
hth,
-Casey
