Просмотр в datagrid всех данных из главной таблицы, где связь с другой таблицей в ms access используется в VB.NET

my problem in SQL query, result has been successful to load data in datagrid like SL_No (2,4,5) but some data are missing from table Pairing like (1,2,3,4,5,6) where relationship table data is not available like (1,3,6) in Receipt table.

Private Sub BtnView_Click(sender As Object, e As EventArgs) Handles btnView.Click

    Dim Sql as String = "Select Pairing.Ledger_Index, Pairing.Fr_Customer_no, Pairing.Fr_Customer_nm, Receipt.Dt_Entry, Receipt.Price from Pairing INNER JOIN Receipt ON Pairing.Fr_Customer_no = Receipt.Sub_No WHERE (((Pairing.Ledger_Address)='" & cmbList.Text & "'))""

    If RdoLedger.Checked=True Then
       DatagridView_Load("sql",DatagridView1)
    End If

End Sub

Public Function DatagridView_Load(ByVal Sql As String, ByVal Model As DataGridView)
    Try
        If con.State = ConnectionState.Open Then
            con.Close()
        End If
        Model.DataSource = Nothing
        Dim da As New OleDbDataAdapter(Sql, con)
        Dim dt As New DataTable
        dt.Clear()
        da.Fill(dt)
        If IsDBNull(dt) = False Then
            Model.DataSource = (dt)
            con.Close()
        Else
            Model.DataSource = Nothing
            con.Close()
        End If

    Catch ex As Exception
        MsgBox("ERROR : " & ex.Message.ToString)
    End Try
    Return True
End Function