SQL HELP , URGENT PLEASE

Question

Hi,
I want some help in writing a SQL Query .Its besically a hierarchical query. Let me lay down the table structure first to explain my requirements better.
PORP_TABLE(NODE_LEVEL int, WBS_ID int, WBS_NUMBER varchar(60), LFT int,RGT int)
SELECT NODE_LEVEL, WBS_ID, LFT,RGT FROM PROPOSAL_WBS PW WHERE PROPOSAL_REV_ID = 7000
(SAMPLE DATA)
NODE WBS
LEVEL WBS_ID NUMBER LFT RGT
0 7055 ROOT 1 24
1 7056 1 2 5
1 7088 2 6 9
2 7057 1.1 3 4
2 7089 2.1 7 8
2 7091 3.1 11 14
2 7103 3.2 15 16
2 7105 4.1 19 20
1 7090 3 10 17
3 7092 3.1.1 12 13
1 7104 4 18 23
2 7106 4.2 21 22
ALLOCATION_DETAIL( WBS_ID int, COST_ID int, PERIOD Date, AMOUNT Float)
sample data
WBS_ID , COST_ID , PERIOD , AMOUNT
7057 100 01-jan-2005 5000
7057 100 01-feb-2005 2000
7057 100 01-mar-2005 1000
7057 100 01-apr-2005 6000
7057 100 01-may-2005 3000
7057 100 01-jun-2005 45000
7106 100 01-mar-2005 8000
7106 100 01-apr-2005 7000
7106 100 01-may-2005 9000
Now the PORP_TABLE has got the parents and childs. Only the leaf nodes in the hierarchy has the values stored in the ALLOCATION_DETAIL table. Now here is the scenario
In the example 7055 is the root WBS . The Leaf WBS are the one with max extension in the wbs number ( in this case it is 1.1, 2.1, 3.1.1, 3.2, 4.1 and 4.2)
Now the Starting period for each leaf node in the ALLOCATION_TABLE could be differrent . What that means is WBS 1.1 could start in Jan -2003 and WBS 3.1 Could be Jul-2005 . So the ending perios are also differrent for differrent WBS . Some can span 2 years some can 5 years.
So how to write a query so it retrieves the value for all the Wbs starting from the MIN ( PERIOD ) upto the MAX(PERIOD), and it should roll up also. Now there is No connect by Prior or any analytic functions available for this . THIS NEEDS TO BE DONE ONLY THROUGH TRADITIONAL SQL STATEMENT . And NO DB FUNCTIONS CAN BE USED .
Now if the WBS is a parent node then it should have the sum of all its child nodes for the COST category.
SO THE RESULT SET SHOULD BRING LIKE THIS
WBS_NUMBER, PERIOD_NUMER, COST_CATEGORY , AMOUNT
ROOT
1
1.1
2
2.1
3
3.1
3.1.1
3.2
4
4.1
4.2
......

Answer 1

Hi,
<br>Read String Aggregation Techniques</br>
<br>HTH,</br>
<br>Nicolas.</br>