On Wed, Dec 21, 2011 at 15:24, salah jubeh <[email protected]> wrote: > Why I can not use it directly as shown in the example below. > why a and b can not be used as aliases for the column names ? I want to know > the theoretical reason behind it?
As far as I know, that's how the SQL standard specifies it. PostgreSQL is pretty strict about following the SQL standard. Diverging from the standard in this aspect would cause ambiguities. Regards, Marti -- Sent via pgsql-general mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
