Hello
I tried to use the except command in postgresql 8.1
I don't understand as it works
When I read doc , I understand that it was like a difference betwwen two
queries
However , It looks as if the 2nd part was ignored
I tried to test by dblink a query unising except on the same database
and all the records where returned
Do anybody know how it works ?
exemple:
select
t1.columns .....
from
table_1 t1
EXCEPT
select
t2.same_columns .....
from
table_2 t2
Olivier