不能直接在C#中执行此操作）再次感谢大家！ sSQL = "INSERT INTO DB1tblClient SELECT * FROM DB2tblClient" CurrentDb.Execute sSQL using (OleDbConne

不能直接在C#中执行此操作）再次感谢大家！

sSQL = "INSERT INTO DB1tblClient SELECT * FROM DB2tblClient"  
CurrentDb.Execute sSQL  

using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Stuff\MyAccessdb.mdb"))
{
    conn.Open();

    using (OleDbCommand cmd = conn.CreateCommand())
    {
        cmd.CommandText = "INSERT INTO DB1tblClient SELECT * FROM DB2tblClient";
        cmd.ExecuteNonQuery();
    }
}

dWConnection.Open();
dWDataAdaptor.SelectCommand = dWCommand1;
dWDataAdaptor.Fill(queryResults1);
dWDataAdaptor.SelectCommand = dWCommand2;
dWDataAdaptor.Fill(queryResults2);
dWConnection.Close();

IEnumerable<DataRow> results1 = (from events in queryResults1.AsEnumerable()
                       where events.Field<string>("event_code").ToString() == "A01"
                       ||  events.Field<string>("event_code").ToString() == "ST"
                       select events ) as IEnumerable<DataRow>;


var results2 = from events1 in queryResults1.AsEnumerable()
    join events2 in queryResults2.AsEnumerable()
    on (string)events1["event_code"] equals (string)events2["event_code"]

    select new
            {
                  f1 = (string)events1["event_code"],
                  f2 = (string)events2["event_name"]
            };

DataTable newDataTable = new DataTable();
newDataTable = results1.CopyToDataTable<DataRow>();