创建在循环内输出不同名称的Oracle PL / SQL过程

Question

I just started with PL/SQL, so, please be kind. I have a simple problem, I want to extract distinct names from a table. When I do that, inside the loop, I am going to do on each of those distinct names some other operations.

I am stuck on how to get the unique names inside a loop. What I do is not working because if I have:

1 MARY
2 MARY
3 JOHN

I am outputting:

MARY
MARY

Instead of:

MARY
JOHN

This is my code:

create or replace PROCEDURE CREATE_TABLE 
(
NM  OUT VARCHAR2,
tot OUT NUMBER
)
AS

BEGIN
SELECT count(DISTINCT NAME) INTO tot FROM MYTABLE;


FOR r IN 1..tot
LOOP
SELECT NAME INTO NM
FROM (
      SELECT DISTINCT NAME,
      ROWNUM rnum
      FROM MYTABLE
      ORDER BY NAME DESC
     ) 
WHERE rnum = r;

dbms_output.put_line (NM);
END LOOP;

END;

Answer 1

I'd use an implicit cursor loop instead, they're very easy to work with.

FOR r in (SELECT DISTINCT NAME
  FROM MYTABLE
  ORDER BY NAME DESC)
LOOP
  NM := r.NAME;
  dbms_output.put_line (NM);
END LOOP;