how to insert values of database in crystal report from two seperate tables

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C#

hello frens, i am doing a project and in that project i m facing a particular project. i have datas in two separate tables namely tblCustomer and tblVehicle, what i need to do is generate a slip in crystal report but it includes column names from these two tables i have done the crystal report generation from single table through the code

string sql = "select Vehentrytime,Vehlane from tblVehicle where Vehid=" + vehicleid + "";

 SqlCommand cmd = new SqlCommand(sql, cnn);
 SqlDataAdapter dscmd = new SqlDataAdapter(cmd);
   DataSet ds = new DataSet();
 dscmd.Fill(ds, "Vehicle");
 cnn.Close();
CrystalReport1 objRpt = new CrystalReport1();
objRpt.SetDataSource(ds.Tables["Vehicle"]);
crystalReportViewer1.ReportSource = objRpt;
crystalReportViewer1.Refresh();

but not from two table, please provide with the code