Deleting rows from one table while filter condition lies into another table

Question

Hi All,
I'm facing a problem deleting a row from a table where the condition lies in other table. To ealaborate the scenario further let's say I have two table T1 (transaction table) and T2 (Master Table). I want to delete a record from table T1 by checking some conditions lies in table T2.
I tried with the below query but this query deleting records from both the table.
DELETE FROM ( SELECT * FROM T1 top INNER JOIN T2 tp
ON top.TID = tp.TID
WHERE top.DEAL_SITE_ID = inputparameter1
AND (TP.SEGMENT <>inputparameter2 OR tp.segment is not null));
Here the record is getting deleted from both the tables but I don't want to delete data from my master table i.e table T2.
Any help would be highly appreciated. Thanks in advance.
Regards,
Subhadeep

Answer 1

SQL> select *
  2   from the_table;
X          Y
AA         a
BB         a
CC         a
AA         b
DD         b
SQL> select *
  2   from the_table_2;
X          Y
AA         a
BB         a
CC         a
SQL>  delete from
  2  (
  3  select *
  4  from the_table  t1 inner join the_table_2 t2
  5  on  t1.x = t2.x
  6  and t1.y = t2.y);
3 rows deleted.
SQL> select *
  2   from the_table;
X          Y
AA         b
DD         b
SQL> select *
  2   from the_table_2;
X          Y
AA         a
BB         a
CC         a