Cursor for loop error - sql

Question

I am trying to write cursor that would insert into table, but I am receiving error, need help with this. Error that I am receiving is ORA-06550.
DECLARE
CURSOR cur_rating IS
SELECT bc.name, bc.title, bc.checkoutdate, bc.returneddate,
b.categoryname,b.publisher, ba.authorname
FROM bookshelf_checkout bc INNER JOIN bookshelf b
ON bc.title = b.title
INNER JOIN bookshelf_author ba
ON bc.title = ba.title
FOR UPDATE NOWAIT;
lv_totdays_num NUMBER(4) := 0;
lv_rating_txt VARCHAR2(2);
BEGIN
FOR rec_rating IN cur_rating LOOP
lv_totdays_num := rec_rating.returneddate -
rec_rating.checkoutdate;
IF lv_totdays_num <= 10 THEN lv_rating_txt := 'DR';
ELSIF lv_totdays_num <= 25 THEN lv_rating_txt := 'CR';
ELSIF lv_totdays_num <= 35 THEN lv_rating_txt := 'BR';
ELSE lv_rating_txt := 'A';
END IF;
INSERT INTO bookshelf_audit (title, publisher, categoryname,
new_rating, auditdate)
VALUES (rec_rating.title, rec_rating.publisher,
rec_rating.categoryname, lv_rating_txt, sysdate)
WHERE CURRENT OF cur_rating;
END LOOP;
COMMIT;
END;

Answer 1

You need to remove the where clause from your insert ... values statement:
INSERT INTO bookshelf_audit
(title, publisher, categoryname,
new_rating, auditdate)
VALUES
(rec_rating.title, rec_rating.publisher,
rec_rating.categoryname, lv_rating_txt, sysdate)
WHERE CURRENT OF cur_rating;
should be
INSERT INTO bookshelf_audit
(title, publisher, categoryname,
new_rating, auditdate)
VALUES
(rec_rating.title, rec_rating.publisher,
rec_rating.categoryname, lv_rating_txt, sysdate);

Answer 2

The WHERE CURRENT OF clause in an UPDATE or DELETE statement states that the most recent row fetched from the table should be updated or deleted :
UPDATE table_name
SET set_clause
WHERE CURRENT OF cursor_name;
OR
DELETE FROM table_name
WHERE CURRENT OF cursor_name;
but not applicable for an INSERT statement.
So, remove WHERE CURRENT OF cur_rating part only, your code will run. That's make your INSERT statement as :
INSERT INTO bookshelf_audit (title, publisher, categoryname,
new_rating, auditdate)
VALUES (rec_rating.title, rec_rating.publisher,
rec_rating.categoryname, lv_rating_txt, sysdate);