Answer Posted / nitin jadav

OracleConnection cn = new OracleConnection("user
id=scott;password=tiger;data source=ganesh1");
OracleDataAdapter da1 = new
OracleDataAdapter("select * from table1", cn);

DataSet ds = new DataSet();
da1.Fill(ds, "temp");

OracleDataAdapter da2 = new
OracleDataAdapter("select * from table2", cn);
DataSet ds1 = new DataSet();
da2.Fill(ds1, "temp");

ds.Merge(ds1);
dataGridView1.DataSource = ds.Tables[0].DefaultView;
label1.Text = ds.Tables[0].Rows.Count.ToString();

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