Using Cursor in oracle SQL - sql

Question

I want to perform the delete operation in 2 tables with a given id here is sudo code
declare
cursor del_id is
select person_id from table_1 where termination is true
begin
for id_x in del_id
delete from table_X where id=id_x
delete from tabele_Y where id=id_x
How to do that ? i can't directly use my cursor please help.
I just try to print my id
begin
for id in del_id
LOOP
dbms_output.put_line(id);
END LOOP;
end;
Getting this error
Error report -
ORA-06550: line 11, column 3:
PLS-00306: wrong number or types of arguments in call to 'PUT_LINE'

Answer 1

To print the values from a cursor, you need to explicitly write the columns you want; dbms_output.put_line can not handle a row that may contain many columns with different types, so you need to pass it a string.
SQL> declare
2 cursor del_id is select 1 as one, 2 as two from dual;
3 begin
4 FOR id IN del_id
5 LOOP
6 dbms_output.put_line(id.one || ' - ' || id.two);
7 END LOOP;
8 end;
9 /
1 - 2
PL/SQL procedure successfully completed.
If you need to use the values from a cursor in some statement, a DELETE in your question, you need to do the same, by explicitly writing the column name; for example:
declare
cursor del_id is select 1 as one, 2 as two from dual;
begin
FOR id IN del_id
LOOP
delete from someTable where someColumn = id.one;
END LOOP;
end;

Answer 2

You do not need a cursor:
BEGIN
DELETE FROM table_X
WHERE id IN ( select person_id from table_1 where termination is true );
DELETE FROM table_Y
WHERE id IN ( select person_id from table_1 where termination is true );
END;
/
You could also use a collection:
CREATE TYPE id_type IS TABLE OF INTEGER;
/
DECLARE
ids id_type;
BEGIN
SELECT person_id
BULK COLLECT INTO ids
FROM table_1
WHERE termination is true;
DELETE FROM table_X
WHERE id MEMBER OF ids;
DELETE FROM table_Y
WHERE id MEMBER OF ids;
END;
/