excel parent child data driven testing

'this is a slower option,but if you dont have too much data to scan through

'this also assume that the order number in the parent exists as a column in the child excel sheet, otherwise i m not sure how to 'identify what 'order' belongs to what parent

set parentDriver = DDT.ExcelDriver ("FullPathParentFileName","sheet",T/FAce)
set childDriver = DDT.Exceldriver("FullPathChildFileName","sheet",T/FAce)

parentDriver.First
while not parentDriver.EOF
      ..'your code here
       orderItemNumer=parentDriver.Value("OrderNumberColumn")
       childDriver.First 
       while not chidldriver.EOF
              if orderItemNumber = childDriver.Value("OrderNumberColumn") then
                      ...'your code here
              end if 
               childDriver.Next
        wend
       parentDriver.Next
wend

The second would be to create an adodb object and query the excel file.

I dont recall the whole process so you might have to do some homework also the above is in vbscript.

the second would to deal with  : http://www.w3schools.com/asp/ado_ref_connection.asp

.. open a connection to the excel file : https://www.connectionstrings.com/excel/

here's an code script from microsoft (again this is vbscript)

On Error Resume Next

Const adOpenStatic = 3
Const adLockOptimistic = 3
Const adCmdText = &H0001

Set objConnection = CreateObject("ADODB.Connection")
Set objRecordSet = CreateObject("ADODB.Recordset")

objConnection.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
    "Data Source=C:\Scripts\Test.xls;" & _
        "Extended Properties=""Excel 8.0;HDR=Yes;"";" 

objRecordset.Open "Select * FROM [Sheet1$]", _
    objConnection, adOpenStatic, adLockOptimistic, adCmdText

Do Until objRecordset.EOF
    Wscript.Echo objRecordset.Fields.Item("Name"), _
        objRecordset.Fields.Item("Number")
    objRecordset.MoveNext
Loop

the site:https://technet.microsoft.com/en-us/library/ee692882.aspx

Hope this helps

EDIT:

forgot to mention,

if you are using a keyword test:

could you not create data driven loop and loop inside that loop?

  DDL ->parent file

       Set Variable Value ->assign the id to a variable

       DDL-> child file

             if.. then    ->variables.variablename Equals Variable.def("d") <--this last one is the DDL from the child above.

                  ..your code?

something like above?