在PL/SQL中正确使用游标需要遵循以下步骤：
CURSOR cursor_name IS
SELECT column1, column2 FROM table_name;
OPEN cursor_name;
FETCH cursor_name INTO variable1, variable2;
CLOSE cursor_name;
LOOP
FETCH cursor_name INTO variable1, variable2;
EXIT WHEN cursor_name%NOTFOUND;
-- 在这里处理游标返回的数据
END LOOP;
