Oracle tuning question or any alternate solution

Question

All Oracle Guru – I need your help in solving this problem. I am simplifying this problem to make it easy to understand. Let's start. For example we have two Tables.
Table one which stores data when one user access any dir on Unix sever has following columns
Table one     
Request Date          Server Name     Dir Accessed     User ID
8/1/2005 12:00:00 PM     COBRA-65     root          conny
8/2/2005 13:00:00 PM     PANTHER-98     opt          conny
8/9/2005 23:00:00 PM     COBRA-965     opt          conny
6/4/2005 22:00:00 PM     COBRA-73     shared          conny
10/7/2005 23:00:00 PM     PANTHER-98     bin          conny
10/7/2005 23:00:00 PM     PANTHER-98     bin          conny
This table gets around 6 to 8 Million records every day and we have data for around 3 months. Total around 650 M Records. Now our users want to access this data and find out who is accessing what on a monthly basis. Requirement is that user will define a application and tell us server name and dir he wants to associate to that application name. So we created another table: - Table two and here is column list for this table.
Table Two
Application Name     Server Name     Dir Accessed
COBRA-ROOT          COBRA73          shared
PANTHER-OPT          PANTHER-98     opt
PANTHER-BIN          PANTHER-98     bin
Now we can not let user run ad hock queries on a table with 650 M records so we decided to create a aggregation table and store monthly data into this table where user can query them .
AGGR_TABLE
Application Name     Request Month     User ID      Total Hits
COBRA-ROOT          Jun-05          conny          1
PANTHER-OPT          Aug-05          conny          1
PANTHER-BIN          Oct-05          conny          2
Now to fill this aggregation table we need to run a monthly aggregation query and her is that query
SELECT B.Application_name APPLICATION_NAME,
TO_DATE(TO_CHAR(A.REQUEST_DATE,'MON-YYYY'),'MON-YYYY') REQUEST_DATE,
A.User ID ,
count(*) TOTAL_NUMBER_OF_HITS
FROM Table Two Table One A
WHERE A.REQUEST_DATE >= trunc(sysdate,'DD')
AND A.REQUEST_DATE < truncadd_Month(sysdate,1),'DD')
AND A.Server Name = B.Server Name
AND A.Dir Accessed = B.Dir Accessed
GROUP BY B.APPLICATION_SECTION,
B.DATA_SOURCE,B.Application_name ,
TO_DATE(TO_CHAR(A.REQUEST_DATE,'MON-YYYY'),'MON-YYYY'),
A.PMDS_PERSON_NUM_SSO
ORDER BY B.Application_name
Now the problem is that this query takes forever too return. Sometime more then 72 hours.. We cannot do incremental updates as minimum we can do is month and if we do increment then we will not be able to collect historical data. This data will grow and we are planning to have 12 month retention..
Any help on query optimizing or any alternate direction will be real help.. Ones again because of company confidentiality I have to change the real table names and query and it is little bit more complicated then I showed you in above example but concept is the same. I will appreciate if any one can help us in any way.
Thanks
TK

Answer 1

You'll need an pk/fk relationship between your tables for a fast refresh to be possible.