Aggregating One Table And Putting Results In Another Table

I need to analyze the results from Table 1, count how many records there are where one field matches, and then put some of Table 1's information into Table 2 along with the count of the records that match. This is built to interface with another system, so a lot of the information, names, and relationships can't always be changed.

Table 1: tblResourceAllocation
Fields (Description):ID (Unique)LastName (Unique alphanumeric string for each employee, but one employee can have multiple records in this table)Project (Unique name, can have multiple entries in this table)Owner (Unique alphanumeric string for each owner, but one owner can have multiple records in this table)ResourceStartDate (datetime)ResourceEndDate (datetime)ServiceID [I](this is what I want to aggregate)Status_FC [I]

Table 2: tblGRFM
ID (unique)Pm (the tblResourceAllocation.Owner's actual full name, which I'll look up from an EmployeeData table and concatenate the FirstName and LastName)IdClient (from tblResourceAllocation.Project I will look up the Customer from the Projects table, then look up the Customer ID from the Customers table)US_State_Id (look up State from Projects table then ID from tblStateCodes)Project_name (same as tblResourceAllocation.Project)Status (same as tblResourceAllocation.Status_FC)Id_operlst (same as tblResourceAllocation.ServiceID)Start (earliest start date of relevant entries)end (latest end date of relevant entries)Nb_ress (total number of ResourceAllocation entries that match Id_operlst)Cadence (explanation below)

I need to calculate how many of each serviceID's are in table 1, and then store that calculation and the ServiceID (Id_operlst) in table 2I need to separate those calculations by Owner, IdClient, US_State_Id, and Project_Name
I.E. If there are 5 entries in table 1 with ServiceId = X, and Owner A is listed on 2 of them and Owner B is listed on 3, I want it displayed as [Owner A, X, 2] and [Owner B, X, 3] in table 2.

Same goes for the other fields, which obviously adds more complexityWithin those calculations I also need to calculate the Start and end date for table 2. Using the last example, if one entry of Owner A's service X has the early start date and the other entry has the later end date, those dates need to be displayed in the Start and end for table 2 (should I use Rank here?)

I need to create a string of numbers separated by semicolons that shows how many resources are working on a given week after the start date

Example:I have 3 resources on a projectResource 1: 12/31/2012-1/27/2013 (Week 1-4 of our calendar)Resource 2: 1/7/2013-1/27/2013 (Week 2-4)Resource 3: 1/7/2013-1/27/2013 (Week 2-4)tblGRFM.Start will equal 12/31/2012 and tblGRFM.end will equal 1/27/2013Cadence should be equal to "1;3;3;3" to indicate that one resource will be working the project the first week, and three resources will be working the project for the next three weeks.