Как объединить выборку из sql запросов?

 string date1 = metroDateTime1.Value.ToString("MM/dd/yyyy H:mm:ss", CultureInfo.InvariantCulture).Replace('.', '/');
                string date2 = metroDateTime3.Value.ToString("MM/dd/yyyy H:mm:ss", CultureInfo.InvariantCulture).Replace('.', '/');
                OleDbDataAdapter adapter = new OleDbDataAdapter(String.Format("Select * from Table1 where time_id Between #{0}# and #{1}# ", date1, date2), conn);

 string constr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C.accdb;Persist Security Info=False";
            string strSql = ("SELECT * FROM Table 1where device_id LIKE '%" + metroComboBox1.Text + "%' AND parameter_id LIKE '%" + metroComboBox3.Text + "%' ");
            //string strSql = "SELECT event_id, device_id, parameter_id, date_id, time_id, user_id FROM Table 1 where device_id like '%" + metroComboBox1.Text + "%' AND parameter_id LIKE '%" + metroComboBox3.Text + "%' ";
 
            OleDbConnection con = new OleDbConnection(constr);
            OleDbCommand cmd = new OleDbCommand(strSql, con);
            con.Open();
            cmd.CommandType = CommandType.Text;
            OleDbDataAdapter da = new OleDbDataAdapter(cmd);
            DataTable GGG = new DataTable();
            da.Fill(GGG);
            metroGrid1.DataSource = GGG;
            con.Close();

OleDbCommand cmd = new OleDbCommand("Select * from 'Table1' where 'device_id' LIKE @P1 AND 'parameter_id' LIKE @P2 AND 'time_id' Between @P3 AND @P4", con);
cmd.Parameters.Add(P1);
cmd.Parameters["P1"].Value = metroComboBox1.Text;
cmd.Parameters.Add(P2);
cmd.Parameters["P2"].Value = metroComboBox1.Tex3;
cmd.Parameters.Add(P3);
cmd.Parameters["P3"].Value = date1;
cmd.Parameters.Add(P4);
cmd.Parameters["P4"].Value = date2;