Could someone please tell me what am I doing wrong that causes both of
the following multi-table insert statements to fail with a "missing key"
error. My Oracle server is Version 9.2.0.2.0.

Thanks,
Niloufar

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create table junk(id number,order_num varchar2(10),bill_amt number);
create table junk2(id2 number,order_num2 varchar2(10),bill_amt2 number);
create table junk_input(order_id number,order_number
varchar2(10),bill_amt number);

insert into junk_input values (1, '1234', 10);
insert into junk_input values (2, '1234', 10);
insert into junk_input values (3, '1234', 10);
insert into junk_input values (4, '5678', 10);
insert into junk_input values (5, '5678', 10);
select * from junk_input;

tried both:

insert all when 1=1
into junk (id, order_num, sequence_num)
select order_id, order_number, seq_num from junk_input;

and tried:

insert all when 1=1
into junk (id, order_num, sequence_num)
when order_number = '5678'
into junk2 (id2, order_num2, sequence_num2)
select order_id, order_number, seq_num from junk_input;