Inserting million of Ids in a single row and make use of them in a Query

Question

Hi ,
we are using Oracle10g. I need to have a table structure like this,
User_Holdings     
User_ID (Number)
Pattern_Number (Number)
Holding_List (CLOB ??)
Eg. Row:
User_ID Patt_No Holding_List
01**********101*********** 98675600,87009922,23965565,10076800,…
02**********96************ 10000011,34564423,22789674,23232232,...
This table contains unique user_ids as rows.
Here each user would have list of Holding_Ids(8-digits) those are seperated by comma.
My problem is, in real time each User will be having around 0.5 to 1.0 million Holding Ids. At that point of time, will this column(Holding_List) able to hold all Holding ids? If yes, which datatype will rightly support that column?
FYI, in the application I need to display the Holding details pertaining to that User_Id. The proposed sample query will be like this,
     >      select col1, col2, col3,...
          from     Holding
          where      Holding_Id IN (select Holding_List
                    from      User_Holding
                    where      user_id = 01);                    
Awaiting your earlier reply.
Thanks.

Answer 1

SQL> select * from User_Holdings;
    USERID PATTERN_NUMBER HOLDING_LIST
         1            101 98675600 87009922 23965565 10076800
         2             96 10000011 34564423 22789674 23232232
SQL> create index User_Holdings_tix on User_Holdings (holding_list) indextype is ctxsys.context;         
Index created.
SQL> select * from User_Holdings where contains(holding_list,'98675600',1) > 0;
    USERID PATTERN_NUMBER HOLDING_LIST
         1            101 98675600 87009922 23965565 10076800Message was edited by:
Laurent Schneider
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 2040 | 4 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| USER_HOLDINGS | 1 | 2040 | 4 (0)| 00:00:01 |
|* 2 | DOMAIN INDEX | USER_HOLDINGS_TIX | | | 4 (0)| 00:00:01 |
well, it uses an index...
HTH