Trying to run simple procedure in SQL Workshop

Question

Hello,
I'd like to test how procedures work and APEX so I setup a simple one that I'd like to run in SQL Workshop (below). I try the follow to execute the procedure:
begin
MY_TEST_PROC;
end;
But it results in the following error:
ORA-06550: line 2, column 1:
PLS-00306: wrong number or types of arguments in call to 'MY_TEST_PROC'
ORA-06550: line 2, column 1:
PL/SQL: Statement ignored
I've spelled the procedure name correctly, and there are no input parameters required. Why is it erring?
Steve
Procedure:
create or replace procedure "MY_TEST_PROC"
*(p_contract_number OUT VARCHAR2)*
is
begin
select
contract_number
into
p_contract_number
from contracts
where id='5';
end;

Answer 1

dbms_output will display a variable's contents. I don't recall if you need set serveroutput on for APEX SQL Workshop or not (I don't have it up right now)
set serveroutput on size 1000000
declare
  result varchar2(4000);
begin
   MY_TEST_PROC(result);
   dbms_output.put_line('My proc result = '||result);
end;The documentation for all the variations of development (11gR2) is here: http://www.oracle.com/pls/db112/portal.portal_db?selected=5&frame= It can be overwhelming starting out. Since you are jumping into stored procedures with APEX, I suggest starting with the 2-day developers guide, then the PL/SQL Language Reference.