Question

How do I apply IN parameter as my_email and OUT as my_salary in this procedure:

CREATE OR REPLACE PROCEDURE FYI_CENTER AS
  my_email employees.email%TYPE;    -- **IN Parameter**
  my_salary employees.salary%TYPE;  -- **OUT Parameter**

BEGIN

  SELECT email, salary INTO my_email, my_salary
    FROM employees WHERE employee_id = 101;

  DBMS_OUTPUT.PUT_LINE('My email = ' || my_email);
  DBMS_OUTPUT.PUT_LINE('My salary = ' || my_salary);
END;

Answer 1

You can’t return a value into an IN parameter. What I suspect you want is a general purpose procedure like this:

CREATE OR REPLACE PROCEDURE FYI_CENTER 
  ( p_employee_id IN employees.employee_id%TYPE
  , p_email OUT employees.email%TYPE
  , p_salary OUT employees.salary%TYPE
  )
AS
BEGIN

  SELECT email, salary INTO p_email, p_salary
    FROM employees WHERE employee_id = p_employee_id;

END;
/

… which you can then call like this:

DECLARE
  my_email employees.email%TYPE;    -- **IN Parameter**
  my_salary employees.salary%TYPE;  -- **OUT Parameter**
BEGIN
  fyi_center (101, my_email, my_salary);
  DBMS_OUTPUT.PUT_LINE('My email = ' || my_email);
  DBMS_OUTPUT.PUT_LINE('My salary = ' || my_salary);
END;
/