Delete two tables based on results of one join - sql

Question

I am trying to delete data from two tables at the same time using inner join. However when I tried to run my query, an error
SQL command not properly ended
error came out.
A brief background of what I am trying to do and some info on the tables, table1 and table2. So both tables has a same field, for instance "ABC". I would like to delete data from both tables using inner join but under the where condition of a field (XYZ) under table where it equals to a value.
This is my sql statment:
DELETE table1, table2
FROM table1
INNER JOIN table1 ON table1.ABC = table2.ABC
WHERE table1.XYZ = 'TESTIT';

Answer 1

You can't delete more than one table.
You must use two different DELETE statements.
For this you can create a temporary table to store IDs to delete, for example:
CREATE TABLE app (ABC varchar(100))
INSERT INTO app (ABC)
SELECT abc
FROM table1
INNER JOIN table1 ON table1.ABC = table2.ABC
WHERE table1.XYZ = 'TESTIT';
DELETE
FROM table1
WHERE table1.ABC IN (SELECT ABC FROM app);
DELETE
FROM table2
WHERE table2.ABC IN (SELECT ABC FROM app);
DROP TABLE app;

Answer 2

In Oracle you cannot delete from 2 tables in a single statement like you are doing. The syntax is wrong. You can use as below:
DELETE table1
where table1.ABC = (select table2.ABC
from table2
WHERE table2.ABC = table1.ABC
and table1.XYZ = 'TESTIT');

Answer 3

A PL/SQL solution might be something like this:
declare
type abc_tt is table of table1.abc%type index by pls_integer;
l_abc_collection abc_tt;
begin
select distinct t1.abc bulk collect into l_abc_collection
from table1 t1
join table2 t2 on t2.abc = t1.abc
where t1.xyz = 'TESTIT';
dbms_output.put_line('Stored ' || l_abc_collection.count || ' values for processing');
forall i in 1..l_abc_collection.count
delete table1 t
where t.xyz = 'TESTIT'
and t.abc = l_abc_collection(i);
dbms_output.put_line('Deleted ' || sql%rowcount || ' rows from table1');
forall i in 1..l_abc_collection.count
delete table2 t
where t.xyz = 'TESTIT'
and t.abc = l_abc_collection(i);
dbms_output.put_line('Deleted ' || sql%rowcount || ' rows from table2');
end;
Output:
Stored 1000 values for processing
Deleted 1000 rows from table1
Deleted 1000 rows from table1
Test setup:
create table table1 (abc, xyz) as
select rownum, 'TESTIT' from dual connect by rownum <= 1000
union all
select rownum, 'OTHER' from dual connect by rownum <= 100;
create table table2 as select * from table1;
After deletion there are 100 rows in each table. I have assumed we only want to delete the ones where xyz = 'TESTIT' even when abc values are common to both tables.

Answer 4

select distinct table1.ABC into Temptable
FROM table1
INNER JOIN table1 ON table1.ABC = table2.ABC
WHERE table1.XYZ = 'TESTIT'
delete table1 where ABC in (select ABC from Temptable)
delete table2 where ABC in (select ABC from Temptable)
drop table Temptable