oracle存储过程的调用

/*例1*/
CREATE OR REPLACE PROCEDURE test1 
IS 
BEGIN 
 NULL; 
END; 

begin
test1();
end;


/*例2*/
CREATE OR REPLACE PROCEDURE test2
( p1 IN nvarchar2 )
as 
BEGIN 
 dbms_output.put_line(p1);
END; 




declare
msg NVARCHAR2(2000);
begin
test2(p1 => ‘肖建‘);
end;




/*例3*/
CREATE OR REPLACE PROCEDURE test3
(
       p1 IN nvarchar2 , 
       p2 out nvarchar2 
)
IS 
BEGIN 
 p2 := p1;
END; 

declare
msg NVARCHAR2(2000);
begin
test3(p1 => ‘xxx‘,p2 =>msg);
dbms_output.put_line(msg);
end;