SQL> desc OPERATION_SCHEDULE
           Name                            Null?    Type
           ------------------------------- -------- ----------------------------
    1      ID                                       NUMBER(38)
    2      SCHEDULED_OPERATIONS                     T#VARRAY
    3    2   TASKID                                 NUMBER
    4    2   AMOUNT                                 NUMBER(10,2)
    5    2   EXTPARAM                               VARCHAR2(32)

SQL> select * from OPERATION_SCHEDULE;

        ID
----------
SCHEDULED_OPERATIONS(TASKID, AMOUNT, EXTPARAM)
--------------------------------------------------------------------------------
         1
T#VARRAY(TSCHEDULE(1, 100,01, '111'), TSCHEDULE(2, 100,02, '222'))

         2
T#VARRAY(TSCHEDULE(3, 200,21, 'xxx'), TSCHEDULE(4, 200,22, 'yyy'))


SQL> with t as (
  2  select 1 id_ref,'Stax' n from dual union all
  3  select 2 id_ref,'Tahiti' n from dual union all
  4  select 3 id_ref,'OraDoc' n from dual union all
  5  select 4 id_ref,'ioserg2018' n from dual
  6  )
  7  select
  8   t.n
  9  ,o.ID
 10  ,a.TASKID
 11  ,a.AMOUNT
 12  ,a.EXTPARAM
 13  from OPERATION_SCHEDULE o,table(o.SCHEDULED_OPERATIONS) a,t
 14  where t.id_ref=a.taskid
 15  /

N                  ID     TASKID     AMOUNT EXTPARAM
---------- ---------- ---------- ---------- --------------------------------
Stax                1          1     100,01 111
Tahiti              1          2     100,02 222
OraDoc              2          3     200,21 xxx
ioserg2018          2          4     200,22 yyy

SQL>