Query --Insert no of records in target based on count

Question

The source table has a count column. Now, depending on the value in the count field of that record, that particular record has to be loaded that number of times with consecutive dates. For e.g. the source table structure looks like:
Resource ID Project ID Count Value     Start Date*     
001     Abc     2     0     01/01/2007     
001     Abc     5     8     01/01/2007     
001     Abc     2     0     01/01/2007     
002     Xyz     2     0     05/01/2007     
002     Xyz     4     10     05/01/2007     
*The Start Date remains same for a particular set of resource id and project id.
Count Field represents the number of days starting from the start date, where a set of resource id and project id has a value specified in the value column. We need to track this source on a day basis. Hence, the number of times a record will be entered into the target will depend on the count value. So, in this example, for resource id - 001 and project id - Abc, starting from date 01/01/2007, for first 2 days, value is 0, next 5 days, value is 8 and next 2 days, value is 0. The target for this source table would look like:
Resource ID Project ID Value     Date     Explanation**     
001     Abc     0     01/01/2007 Count = 2. Hence 2 records inserted.
001     Abc     0     02/01/2007          
001     Abc     8     03/01/2007Count = 5. Hence 5 records inserted.
001     Abc     8     04/01/2007          
001     Abc     8     05/01/2007          
001     Abc     8     06/01/2007          
001     Abc     8     07/01/2007          
001     Abc     0     08/01/2007Count = 2. Hence 2 records inserted.
001     Abc     0     09/01/2007          
002     Xyz     0     05/01/2007Count = 2. Hence 2 records inserted.
002     Xyz     0     06/01/2007          
002     Xyz     10     07/01/2007Count = 4. Hence 4 records inserted.
002     Xyz     10     08/01/2007          
002     Xyz     10     09/01/2007          
002     Xyz     10     10/01/2007          
** This column is not there in the target
Kindly let me know how we can devise this logic.
Thanks a lot in advance.
Cheers

Answer 1

I would suggest you use PL/SQL for this . Here is a Code Stub ( not tested ) , this is just for your reference , customize it for your need .
declare
Cursor Cur_Resource IS
Resource_ID , Project_ID , Count_Value , Start_Date From <Table> ;
BEGIN
For orec in Cur_Resource Loop
For i in 1..orec.Count_Value Loop
Insert into Table2 values (orec.Resource_ID, orec.Project_ID, orec.Count_Value , orec.Start_Date+i)
End Loop;
End Loop;
END;