DataSet ds = new DataSet();
SqlDataAdapter DA1 = new SqlDataAdapter("select * from table_A",conn);
SqlDataAdapter DA2 = new SqlDataAdapter("select * from table_B",conn);DA1.Fill(ds.tables["aaa"]);
DA2.Fill(ds.tables["bbb"]);
SqlDataAdapter DA1 = new SqlDataAdapter("select * from table_A",conn);
SqlDataAdapter DA2 = new SqlDataAdapter("select * from table_B",conn);DA1.Fill(ds.tables["aaa"]);
DA2.Fill(ds.tables["bbb"]);
SqlDataAdapter sqlDataAdapter= new SqlDataAdapter("select * from B",connetion);
sqlDataAdapter.Fill(ds,"B");