please help me ???

Dear All

I'am a new user in postgresql, i want to ask about :

1. The one who is intended with STORED PROCEDURE,
how its implement and what its surplus.
Version POSTGRESQL that how much possess STRORED PROCEDURE.

2. In when I make the function as follows:

CREATE FUNCTION forward(CHAR(10))
RETURNS CHAR(10), CHAR(30)
AS 'select no_id, name FROM address where no_id=$1;'
Language 'sql';

To step forward orders the error ...
Which wants I asked, how make a function that can step forward
RETURNS More than a column
(I want to show 2 columns i.e. no_id and Name) ?

thank's
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