select query with PL/SQL - sql

Question

I ran this PL/SQL script, I want to store this PL/SQL in a procedure so that I would give it one parameter and returns info about that parameter, for now I ran it separately outside the procedure but I get the following error, please your help :
error signaled in parallel query server
declare
a VARCHAR2(100 CHAR);
b VARCHAR2(30 CHAR);
c VARCHAR2(50 CHAR);
d VARCHAR2(30 CHAR);
e VARCHAR2(100);
f VARCHAR2(30 CHAR);
BEGIN
SELECT
col1 ,
col2,
col3,
col4,
col5,
col6,
INTO
a,
b,
c,
d,
e,
f
FROM
MY_TABLE
WHERE
col1= 123;
dbms_output.put_line(a||','||b||','||c||','||d||','||e||','||f);
END;

Answer 1

There is a misplaced comma (,) after col6. Remove it the code will work:
declare
a VARCHAR2(100 CHAR);
b VARCHAR2(30 CHAR);
c VARCHAR2(50 CHAR);
d VARCHAR2(30 CHAR);
e VARCHAR2(100);
f VARCHAR2(30 CHAR);
BEGIN
SELECT
col1 ,
col2,
col3,
col4,
col5,
col6,
INTO
a,
b,
c,
d,
e,
f
FROM
MY_TABLE
WHERE
col1= 123;
dbms_output.put_line(a||','||b||','||c||','||d||','||e||','||f);
END;
If you want to create a procedure then here goes the code:
declare
a VARCHAR2(100 CHAR);
b VARCHAR2(30 CHAR);
c VARCHAR2(50 CHAR);
d VARCHAR2(30 CHAR);
e VARCHAR2(100);
f VARCHAR2(30 CHAR);
BEGIN
SELECT
col1 ,
col2,
col3,
col4,
col5,
col6
INTO
a,
b,
c,
d,
e,
f
FROM
MY_TABLE
WHERE
col1= 123;
dbms_output.put_line(a||','||b||','||c||','||d||','||e||','||f);
END;

Answer 2

I really was stuck on this, but this is my final answer as the query returns more than one row, and it works just fine.
CREATE OR REPLACE PROCEDURE my_fun
(
PARAM1 IN VARCHAR2
) AS
ref_curs SYS_REFCURSOR;
a VARCHAR2(100 CHAR);
b VARCHAR2(30 CHAR);
c VARCHAR2(50 CHAR);
d VARCHAR2(30 CHAR);
e VARCHAR2(100);
f VARCHAR2(30 CHAR);
BEGIN
OPEN ref_curs FOR
SELECT
col1 ,
col2,
col3,
col4,
col5,
col6
FROM
my_table
WHERE
col1= = PARAM1 ;
DBMS_OUTPUT.PUT_LINE('col1 ,col2,col3,col4,col5,col6');
LOOP
FETCH ref_curs INTO a,b,c,d,e,f;
EXIT WHEN ref_curs%NOTFOUND;
DBMS_OUTPUT.PUT_LINE(a||','|| b||','||c||','||d||','||e||','||f);
END LOOP;
CLOSE ref_curs;
END my_fun;