CONNECT BY PRIOR - ORDERING ROWS

Question

Hi all,
I am working on database server - oracle 10g enterprise edition R2,
forms - Oracle forms 10G -Version 10.1.2.0.2 on windows 2000 professional.
I have a table ACCOUNT_GROUP_MASTER with the following structure.
DESC ACCOUNT_GROUP_MASTER
Name Null? Type
ACCOUNT_GROUP_CODE NOT NULL NCHAR(6)
ACCOUNT_GROUP_NAME NOT NULL NVARCHAR2(40)
ACCOUNT_GROUP_TYPE CHAR(1)
GROUP_DISP_ORDER NUMBER(3)
MAIN_GROUP_CODE NCHAR(6)
Account_group_code is the primary key
and Main_group_code is the foreign key(self referencing) referring Account_group_code of the same table.
My query and the returned data are given below.
SELECT
level, account_group_code act, GROUP_DISP_ORDER ord
FROM ACCOUNT_GROUP_MASTER
CONNECT BY PRIOR ACCOUNT_GROUP_CODE=MAIN_GROUP_CODE
START WITH main_GROUP_code is null
order by account_group_code
LEVEL ACT      ORD
1 4000 1
2 4100
2 4200 3
2 4300 1
1 2000 2
2 2100     2
2 2200     1
My task is to sort the output in the order of
First sort column is "level" and within the "level", data should be sorted by the
group_disp_order column.
That is the above output should come as given below.
LEVEL ACT ORD
1 4000 1
2 4100
2 4300 1
2 4200 3
1 2000 2
2 2200     1
2 2100     2
Can anybody help me please.
Thanks in advance.
Regards
Mohan

Answer 1

Hi All
The solution to the above problem is solved by the following query.
SELECT 1,level, account_group_code|| account_group_NAME,NULL,
account_group_code
FROM ACCOUNT_GROUP_MASTER
CONNECT BY PRIOR ACCOUNT_GROUP_CODE=MAIN_GROUP_CODE
START WITH main_GROUP_code is null
order siblings by group_disp_order
Regards
Mohan