Subquery inside INSERT INTO

Question

Hi !
I have a problem to put a Subquery inside an INSERT INTO-Statement.
I try it this way: (the select-statemnet alone is running fine) (the listing is shortened)
INSERT INTO W_CACS_ENTRY
location_code
,case_num
,billing_account_id
select
a.location_code
,a.case_num
,billing.billing_account_id
from
select
max(billing_account_id) as billing_account_id
from
select /*+ parallel ( a 4)*/
account_no
,external_id
) case,
w_billing_accounts bill
where
case.account_no = bill.account_no
) billing
w_CO_CASE_HIST a
where .....bla...
When I try to compile it i get the following error:
ORA-Seperator S223:
(S223) Expecting: statement_terminator BEGIN CASE DECLARE END IDENTIFIER IF LOOP
Is it forbidden to use Subquerys inside an INSERT TO statement?
Are there any other possibilities?
thanks and greets
bang

Answer 1

yes, it's inside a PL/SQL-Package. I'm using TOAD to develop it.
Here is the whole query:
INSERT INTO W_CACS_ENTRY
    location_code
    ,case_num
    ,EVENT_TYPE
    ,EVENT_DATE
    ,event_id
    ,cacs_case_sequence
    ,part
    ,billing_account_id
select
     a.location_code
    ,a.case_num
    ,'CACS IN' as EVENT_TYPE
    ,a.DATE_TIME as EVENT_DATE
    ,a.sequence_number as event_id
    ,seq_cacs_case_dwh.nextval as cacs_case_sequence
    ,substr(seq_cacs_case_dwh.currval, -1) as part  
    ,billing.billing_account_id   
    from
            select  /*+ use_hash (case bill) parallel (bill 4) */
             case_num
            ,LOCATION_CODE
            ,max(billing_account_id) as billing_account_id
            from
                select  /*+ parallel ( a 4)*/
                account_no
                ,external_id  as case_num
                ,101010 as LOCATION_CODE
                from
                w_CUSTOMER_ID_ACCT_MAP ar
                union all
                select  /*+ parallel ( a 4)*/
                account_no
                ,external_id  as case_num
                ,202020 as LOCATION_CODE
                from
                c_CUSTOMER_ID_ACCT_MAP ar 
            ) casec,
            w_billing_accounts  bill
            where
            casec.account_no = bill.account_no
            group by
             case_num
            ,LOCATION_CODE
       ) billing
       w_CO_CASE_HIST a
        where a.coll_activity_code in ('EN','MS')
        and a.DATE_TIME > to_date ('01.01.2006','dd.mm.yyyy')
        and billing.case_num = a.case_num
        and billing.location_code = a.location_code
;