How To Save SQL Server 2008 Multiple Tables

I have a select query like this. But from the below codes, I cannot update t2.unit_price in the same SqlDataAdapter

My Codes :
Dim MyQuery1 as String="Select t1.item_id,t1,group_id,t2.unit_price from Table1 t1 left outer join Table2 t2 on T1.Item_ID=T2.Item_ID"
Dim DAp1 as SqlDataAdapter,Ds1 as New DataSet
Con.Open()
DataAdapter1=New SqlDataAdapter(MyQuery1,Con)
DataAdapter1.Fill(Ds1)
[Code] .....

From the above codes
Dim Sav1 As String = "insert into table1 .........."
I don't know how to mention table2 also there ?