Expression cannot be used as an INTO-target of a SESELECT/FETCH Statement

Question

Hello guys
Iam new to oracle and this my first post
I have written this code in sql
declare
2 cursor madecursor is select bus_id ,bus_destination ,seat_no ,
3 driver_name from bus for update of seat_no nowait ; myseat bus.seat_no%type
4 ; begin
5 for bus_id in madecursor loop
6 select myseat into bus.bus_id from bus where
7 bus_id = bus_id
8 ; if
9 myseat < 5 then
10 update bus set seat_no = seat_no*2 WHERE CURRENT OF madecursor
11 ; DBMS_OUTPUT.PUT_LINE('Updated');
12 end if ;
13 end loop;
14 end;
but I have the following errors:-
ERROR at line 6:
ORA-06550: line 6, column 27:
PLS-00403: expression 'BUS.BUS_ID' cannot be used as an INTO-target of a SELECT/FETCH statement
ORA-06550: line 6, column 2:
PL/SQL: SQL Statement ignored
please help me.
Thanks in advance.
user613283

Answer 1

Firstly thank you for replies , I get use of your suggestions and change my code but still having errors please suggest.
SQL> declare
2 I_myseat bus.seat_no%type;
3 begin
4
5
6 select I_myseat into I_myseat from
7 bus where
8 bus_id = bus.bus_id
9 ;
10 if I_myseat < 5 then
11 update bus set seat_no = seat_no*2
12 where I_myseat<5
13 ; DBMS_OUTPUT.PUT_LINE('Updated');
14
15 end if;
16 end;
17 / declare
ERROR at line 1:
ORA-01422: exact fetch returns more than requested number of rows
ORA-06512: at line 6