I am trying to create a pivot table. How can I define to sum of the each field that I grouped ...

Sounds like your issue can be solved readily with a pivot table.
If you give the columns of names a title like "NAME" and the number columns a name like "VALUE". All other columns should contain a unique name.

Then select the entire table, including the labels at the top ensuring that the range extends entirely over the column you need to sum the values of.

In Excel 2013, choose the INSERT menu and select the PIVOT TABLE command.
Insert the Pivot table into a new worksheet.
A new sheet will open with a strange-looking control panel on the right of the window.
Make sure that the box for NAME and VALUE (only) are checked

You will notice that Excel assumes that you want the SUM of the values for each NAME summed. The results are in the leftmost area of the worksheet.

If this works for you, please vote my answer as "helpful".

In general you initiate this process by pressing the "Relationships" button on the MS Access toolbar. It is the button with three small boxes arranged in a triangle shape.


When it first comes up it will give you the option to add tables. You can add any set of tables including the possibility of adding one table more than once (you would do this if you wanted to create a relationship between fields in the same table).

Once you see the tables you're interested in, you simply drag the field from one table over a field in another table. The fields should be those that will define the relationship. Once done, you should see an Edit Relationships window. You can get back to the Edit Relationships window later by double clicking the line in the relationships window.


MS Access does a good job of figuring out the relationship type. For example, if you match a field in one table, that is not a key, with a primary key in another table, Access will make this a Many-to-One relationship.

This can become a very deep subject. Hope this at least gets you in the right direction.

My suggestion is to use a Pivot Table.  Follow these instructions:
Click on column A1 - then in the menu bar click DATA > Pivot Table and Pivot Chart Report.  

Click NEXT on step 1 of pivot table wizard.
For step two you will want to highlight all of the data on your sheet.  then click next.
Choose NEW WORKSHEET for step 3 of the pivot table wizard and click finish.
Once the Pivot Table sheet opens, drag the STATUS field into the top left corner of the pivot table view, where "drop column fields" and "drop row fields" meet.  Next drop another instance of the STATUS field into the "drop row fields here" column.  And lastly drop the OWNER field into the "drop column fields here" section.  You should now be viewing a report showing you exactly what you were looking for.
Regards,
Joe

Relationships

After you've set up multiple tables in your Microsoft Access database, you need a way of telling Access how to bring that information back together again. The first step in this process is to define relationships between your tables. After you've done that, you can create queries, forms, and reports to display information from several tables at once.

A relationship works by matching data in key fields - usually a field with the same name in both tables. In most cases, these matching fields are the primary key from one table, which provides a unique identifier for each record, and a foreign key in the other table. For example, teachers can be associated with the students they're responsible for by creating a relationship between the teacher's table and the student's table using the TeacherID fields.

Having met the criteria above, follow these steps for creating relationships between tables.

1. In the database window view, at the top, click on Tools ---> Relationships
2. Select the Tables you want to link together, by clicking on them and selecting the Add Button
3. Drag the primary key of the Parent table (Teacher in this case), and drop it into the same field in the Child table (Student in this case.)
   
4. Select Enforce Referential Integrity
   
   • When the Cascade Update Related Fields check box is set, changing a primary key value in the primary table automatically updates the matching value in all related records.
   • When the Cascade Delete Related Records check box is set, deleting a record in the primary table deletes any related records in the related table
5. Click Create and Save the Relationship

If you select the correct table from the drop down, the fields should be shown in the box. or keep the table open and try creating form. or create a blank form and on the right side you will get tables and fields, you can just drag and drop required fields

Try this

#define dbLogical 1
#define dbNumber 2
#define dbInteger 3
#define dbLongInteger 4
#define dbCurrency 5
#define dbSingle 6
#define dbDouble 7
#define dbDateTime 8
#define dbBinary 9
#define dbText 10
#define dbOLEObject 11
#define dbMemo 12
#define dbReplication 15
#define dbDecimal 16
if file("C:\accesstest.mdb")
delete file c:\accesstest.mdb
endif
public oAccess
oAccess = createobject("Access.application")
oAccess.visible= .t.
newMDB = oAccess.NewCurrentDatabase("C:\accesstest")
newtable = oAccess.CurrentDb.CreateTableDef('testtable')
with newtable
.fields.append(.CreateField("Field1", dbLogical))
.fields.append(.CreateField("Field2", dbNumber))
.fields.append(.CreateField("Field3", dbInteger))
endwith
oAccess.CurrentDb.TableDefs.append( newtable)
dbc2Convert = "\\tpdfiles\data\dfreeman\tip\data\rta\rta"
open database (dbc2convert)

dbgetprop(rta,"table",)

After it runs you will need to close the MDB and reopen it.

Looks like your GROUP BY subclause says to group by Force_no but also the yyyy and m datepart values for Subs_Dt as separate items. [Also since you are returning "Force_no AS FN", you need to refer to it as 'FN' and not 'Force_no' in the other subclauses of the statement. Same is true for your partial-date references as well in the SELECT subclause] So the query will return the grouping not by Force_no (should be FN) and some partial date but instead by Force_no (shoukd be FN), the year, and then the month.

The fix would be to group by a concatenation of the year and month and to change the references to the fields to be what you renamed them as in your SELECT subclause using "...AS...", for example:

SELECT GIS_Subs.Force_No AS FN, DatePart("yyyy",GIS_Subs!Subs_Dt) AS AYear, DatePart("m",GIS_Subs!Subs_Dt) AS AMonth, DSum("Subs_Amt","GIS_Subs","DatePart('m', [Subs_Dt])<=" & [AMonth] & " And DatePart('yyyy', [Subs_Dt])<=" & [AYear] & "") AS RunTot
FROM GIS_Subs
GROUP BY FN, AYear & "-" & AMonth
ORDER BY AYear, AMonth;

So now you have only 2 GROUP BY parameters instead of three and the grouped results won't be done by FN, then year, then month, but by FN and year-month. [As for the "-" in GROUP BY subclause, you can use any character you want as the separator; I just picked "-" since it is so typical.]

The DSum function in the SELECT subclause may also need some rework; also, possibly you will need to return [Subs_Dt] in the clause as well so DSum() has it to work with. Also check to be sure that reference to [Subs_Dt] is being recognized OK without using the "table!field" form of reference. I dunno if you need it given I don't know your whole table-field definition and so can't say if there would be a naming conflict someplace.

If you are still having trouble, try starting over and building this query piece by piece, one field, one condition, one subclause, at a time until you get to where it breaks for you. That'll be the "threshold of failure" you are looking for that should point you further in the right direction.

I hope this works for you. Let me know how it goes!

Highlight the entire pivot table and name it as a range. Then in the formula, replace the reference to the table addresses with the range name. Then wherever you move the table (move, not cut and paste) it will automatically gather the right data. Thanks for rating FixYa!

Prepare table having coloumns Client, Premium Amount , Month.

 

Now take Pivot table of the above table. Take Field 'Month' in Page field and Client in 'Row' field and sum of amount in 'Data field'.

 

If you refresh the data and select the required month you will get the desired information.